diff --git a/include/unk_02073C2C.h b/include/unk_02073C2C.h
index 0eebc14bde..b0b4cefc9a 100644
--- a/include/unk_02073C2C.h
+++ b/include/unk_02073C2C.h
@@ -24,7 +24,7 @@
 void ZeroMonData(Pokemon * param0);
 void ZeroBoxMonData(BoxPokemon * param0);
 int PokemonStructSize(void);
-Pokemon * CallocMon(u32 param0);
+Pokemon * AllocMonZeroed(u32 heapID);
 BOOL sub_02073C88(Pokemon * param0);
 BOOL sub_02073CD4(Pokemon * param0, BOOL param1);
 BOOL sub_02073D20(BoxPokemon * param0);
diff --git a/src/overlay005/ov5_021E622C.c b/src/overlay005/ov5_021E622C.c
index cc43f7c609..93f3e4a441 100644
--- a/src/overlay005/ov5_021E622C.c
+++ b/src/overlay005/ov5_021E622C.c
@@ -2100,7 +2100,7 @@ static void ov5_021E63E0 (Pokemon * param0)
 
 static int ov5_021E6444 (Party * param0, UnkStruct_02026218 * param1, UnkStruct_0200B358 * param2)
 {
-    Pokemon * v0 = CallocMon(4);
+    Pokemon * v0 = AllocMonZeroed(4);
     BoxPokemon * v1 = sub_02026220(param1);
     UnkStruct_02026224 * v2 = sub_02026224(param1);
     u32 v3;
@@ -2142,7 +2142,7 @@ u16 ov5_021E64F8 (Party * param0, UnkStruct_0200B358 * param1, UnkStruct_0202631
 
 int ov5_021E6520 (BoxPokemon * param0, u32 param1)
 {
-    Pokemon * v0 = CallocMon(4);
+    Pokemon * v0 = AllocMonZeroed(4);
     BoxPokemon * v1 = sub_02076B10(v0);
     int v2;
     u32 v3;
@@ -2685,7 +2685,7 @@ void ov5_021E6EA8 (UnkStruct_02026310 * param0, Party * param1, UnkStruct_02025E
 {
     u16 v0;
     u8 v1[2], v2;
-    Pokemon * v3 = CallocMon(4);
+    Pokemon * v3 = AllocMonZeroed(4);
 
     v0 = ov5_021E6C20(param0, v1);
     v0 = ov5_021E6B54(v0, param0);
@@ -3036,7 +3036,7 @@ static void ov5_021E742C (Pokemon * param0, int param1)
     u8 v5[6], v6;
     u8 v7, v8, v9, v10, v11, v12, v13, v14;
     UnkStruct_02023790 * v15 = sub_02023790(7 + 1, param1);
-    Pokemon * v16 = CallocMon(param1);
+    Pokemon * v16 = AllocMonZeroed(param1);
 
     v0 = GetMonData(param0, MON_DATA_SPECIES, NULL);
 
diff --git a/src/overlay006/ov6_02240C9C.c b/src/overlay006/ov6_02240C9C.c
index da9e4d4d88..a661d483e5 100644
--- a/src/overlay006/ov6_02240C9C.c
+++ b/src/overlay006/ov6_02240C9C.c
@@ -1131,7 +1131,7 @@ static void ov6_02241BAC (const u16 param0, const u8 param1, const int param2, c
     u8 v4;
     Pokemon * v5;
 
-    v5 = CallocMon(11);
+    v5 = AllocMonZeroed(11);
     ZeroMonData(v5);
 
     v2 = 0;
@@ -1202,7 +1202,7 @@ static void ov6_02241CC0 (u16 param0, u8 param1, const int param2, const UnkStru
     BOOL v2;
     Pokemon * v3;
 
-    v3 = CallocMon(11);
+    v3 = AllocMonZeroed(11);
     ZeroMonData(v3);
     v0 = 1;
 
@@ -1620,7 +1620,7 @@ static void ov6_0224239C (const u32 param0, UnkStruct_0206C638 * param1, UnkStru
     BOOL v6;
     Pokemon * v7;
 
-    v7 = CallocMon(4);
+    v7 = AllocMonZeroed(4);
     v0 = sub_0202D93C(param1, 4);
     v1 = sub_0202D93C(param1, 6);
     v2 = sub_0202D93C(param1, 2);
diff --git a/src/overlay006/ov6_02246184.c b/src/overlay006/ov6_02246184.c
index 9ffc8b0992..047bf49447 100644
--- a/src/overlay006/ov6_02246184.c
+++ b/src/overlay006/ov6_02246184.c
@@ -73,7 +73,7 @@ UnkStruct_ov6_02246204 * ov6_02246184 (u32 param0, u32 param1)
     v0->unk_00 = sub_02006FE8(115, param1, 0, param0, 0);
     v0->unk_10 = param0;
     v0->unk_0C = param1;
-    v0->unk_04 = CallocMon(param0);
+    v0->unk_04 = AllocMonZeroed(param0);
     v0->unk_08 = sub_02025E6C(param0);
 
     sub_02025E8C(v0->unk_08);
diff --git a/src/overlay016/ov16_0225177C.c b/src/overlay016/ov16_0225177C.c
index 927433361f..2aef5061f8 100644
--- a/src/overlay016/ov16_0225177C.c
+++ b/src/overlay016/ov16_0225177C.c
@@ -6186,7 +6186,7 @@ BOOL ov16_02259B9C (UnkStruct_0207ADB4 * param0, UnkStruct_ov16_0224B9DC * param
                     int v4;
                     int v5;
 
-                    v3 = CallocMon(5);
+                    v3 = AllocMonZeroed(5);
 
                     if (ov16_0223DF0C(param0) & 0x2) {
                         v4 = param1->unk_21A8[param1->unk_118][1];
diff --git a/src/overlay016/ov16_0225CBB8.c b/src/overlay016/ov16_0225CBB8.c
index 135fc30678..a511f120c2 100644
--- a/src/overlay016/ov16_0225CBB8.c
+++ b/src/overlay016/ov16_0225CBB8.c
@@ -4289,7 +4289,7 @@ static void ov16_02261E8C (UnkStruct_0201CD38 * param0, void * param1)
                         v7 = v0->unk_09;
                     }
 
-                    v9 = CallocMon(5);
+                    v9 = AllocMonZeroed(5);
 
                     for (v3 = 0; v3 < 6; v3++) {
                         Party_AddPokemon(v0->unk_04->unk_00, v9);
diff --git a/src/overlay022/ov22_0225AF8C.c b/src/overlay022/ov22_0225AF8C.c
index 863931f805..98c345bb1c 100644
--- a/src/overlay022/ov22_0225AF8C.c
+++ b/src/overlay022/ov22_0225AF8C.c
@@ -243,7 +243,7 @@ static UnkStruct_ov22_0225B1BC * ov22_0225B1BC (const UnkStruct_ov22_0225B4E4 *
     memset(v0, 0, sizeof(UnkStruct_ov22_0225B1BC));
 
     v0->unk_29C = param0->unk_68;
-    v0->unk_298 = CallocMon(param0->unk_68);
+    v0->unk_298 = AllocMonZeroed(param0->unk_68);
     sub_0202A61C(param0->unk_00, v0->unk_298);
 
     ov22_0225B2D4(v0, param0);
@@ -273,7 +273,7 @@ static UnkStruct_ov22_0225B1BC * ov22_0225B258 (const UnkStruct_ov22_0225B4E4 *
     memset(v0, 0, sizeof(UnkStruct_ov22_0225B1BC));
 
     v0->unk_29C = param0->unk_68;
-    v0->unk_298 = CallocMon(param0->unk_68);
+    v0->unk_298 = AllocMonZeroed(param0->unk_68);
 
     sub_0202A61C(param0->unk_00, v0->unk_298);
 
diff --git a/src/overlay022/ov22_0225B660.c b/src/overlay022/ov22_0225B660.c
index 5914356977..89352fc7c0 100644
--- a/src/overlay022/ov22_0225B660.c
+++ b/src/overlay022/ov22_0225B660.c
@@ -350,7 +350,7 @@ static void ov22_0225BC18 (UnkStruct_ov22_0225B85C * param0)
     sub_0202A524(param0->unk_04, v2);
     sub_0200B48C(v1, 3, v2, v4, 1, GAME_LANGUAGE);
 
-    v5 = CallocMon(13);
+    v5 = AllocMonZeroed(13);
     sub_0202A560(param0->unk_04, v5);
     v6 = sub_02076B10(v5);
     sub_0200B5CC(v1, 4, v6);
diff --git a/src/overlay081/ov81_021D1610.c b/src/overlay081/ov81_021D1610.c
index 15e201cf8d..6beff753be 100644
--- a/src/overlay081/ov81_021D1610.c
+++ b/src/overlay081/ov81_021D1610.c
@@ -822,7 +822,7 @@ static void ov81_021D285C (UnkStruct_ov81_021D1610 * param0, UnkStruct_0205AA50
 
 static void ov81_021D28C8 (UnkStruct_ov81_021D1610 * param0, u16 param1, u8 param2, u8 param3)
 {
-    Pokemon * v0 = CallocMon(42);
+    Pokemon * v0 = AllocMonZeroed(42);
 
     sub_02074088(v0, param1, 1, 32, param2, 0, 0);
     sub_0200B538(param0->unk_54, param3, sub_02076B10(v0));
diff --git a/src/overlay087/ov87_021D106C.c b/src/overlay087/ov87_021D106C.c
index a16f09cc44..5b3bb5d495 100644
--- a/src/overlay087/ov87_021D106C.c
+++ b/src/overlay087/ov87_021D106C.c
@@ -114,7 +114,7 @@ UnkStruct_ov87_021D106C * ov87_021D106C (UnkStruct_ov87_021D0D80 * param0, const
         v0->unk_1F0 = sub_0200B358(61);
         v0->unk_1F4 = sub_02023790(256, 61);
         v0->unk_1F8 = sub_02023790(256, 61);
-        v0->unk_1FC = CallocMon(61);
+        v0->unk_1FC = AllocMonZeroed(61);
 
         sub_02017798(ov87_021D11AC, v0);
     }
diff --git a/src/overlay088/ov88_0223B140.c b/src/overlay088/ov88_0223B140.c
index e932453c4c..847475de5d 100644
--- a/src/overlay088/ov88_0223B140.c
+++ b/src/overlay088/ov88_0223B140.c
@@ -2496,8 +2496,8 @@ static void ov88_0223E694 (Party * param0, Party * param1, int param2, int param
 {
     Pokemon * v0, * v1;
 
-    v0 = CallocMon(26);
-    v1 = CallocMon(26);
+    v0 = AllocMonZeroed(26);
+    v1 = AllocMonZeroed(26);
 
     sub_020775EC(Party_GetPokemonBySlotIndex(param0, param2), v0);
     sub_020775EC(Party_GetPokemonBySlotIndex(param1, param3), v1);
diff --git a/src/overlay094/ov94_02242AD0.c b/src/overlay094/ov94_02242AD0.c
index fa1a039948..9bc5f85888 100644
--- a/src/overlay094/ov94_02242AD0.c
+++ b/src/overlay094/ov94_02242AD0.c
@@ -794,7 +794,7 @@ static int ov94_02243398 (UnkStruct_ov94_0223FD4C * param0)
             param0->unk_36 = 0;
 
             if (sub_0202DA60(param0->unk_00->unk_00)) {
-                Pokemon * v1 = CallocMon(62);
+                Pokemon * v1 = AllocMonZeroed(62);
 
                 sub_0202DA70(param0->unk_00->unk_00, v1);
                 sub_0200B5CC(param0->unk_B8C, 0, sub_02076B10(v1));
@@ -814,7 +814,7 @@ static int ov94_02243398 (UnkStruct_ov94_0223FD4C * param0)
             param0->unk_36 = 0;
 
             if (sub_0202DA60(param0->unk_00->unk_00)) {
-                Pokemon * v2 = CallocMon(62);
+                Pokemon * v2 = AllocMonZeroed(62);
 
                 sub_0202DA70(param0->unk_00->unk_00, v2);
                 sub_0200B5CC(param0->unk_B8C, 0, sub_02076B10(v2));
@@ -1250,7 +1250,7 @@ static int ov94_02243AE8 (UnkStruct_ov94_0223FD4C * param0)
 static void ov94_02243B08 (UnkStruct_ov94_0223FD4C * param0, int param1)
 {
     if (param0->unk_110 != 18) {
-        Pokemon * v0 = CallocMon(62);
+        Pokemon * v0 = AllocMonZeroed(62);
 
         sub_020774C8(sub_02079C9C(param0->unk_00->unk_0C, param0->unk_110, param0->unk_112), v0);
         sub_0202DA7C(param0->unk_00->unk_00, v0, param0->unk_110);
diff --git a/src/overlay094/ov94_022444C8.c b/src/overlay094/ov94_022444C8.c
index 332cfbbfc3..89d39ffa9c 100644
--- a/src/overlay094/ov94_022444C8.c
+++ b/src/overlay094/ov94_022444C8.c
@@ -38,7 +38,7 @@ static const UnkStruct_0208BE5C Unk_ov94_0224636C = {
 
 int ov94_022444C8 (UnkStruct_ov94_0223FD4C * param0, int param1)
 {
-    param0->unk_1104 = CallocMon(62);
+    param0->unk_1104 = AllocMonZeroed(62);
 
     switch (param0->unk_24) {
     case 7:
@@ -110,7 +110,7 @@ int ov94_02244678 (UnkStruct_ov94_0223FD4C * param0, int param1)
                 }
             } else if ((param0->unk_24 == 8) || (param0->unk_24 == 10)) {
                 Pokemon * v1 = ov94_022448AC(param0, param0->unk_24);
-                Pokemon * v5 = CallocMon(62);
+                Pokemon * v5 = AllocMonZeroed(62);
 
                 sub_0202DA70(param0->unk_00->unk_00, v5);
 
diff --git a/src/overlay104/ov104_0222ECE8.c b/src/overlay104/ov104_0222ECE8.c
index 6c41f0b4c3..00bfdb50de 100644
--- a/src/overlay104/ov104_0222ECE8.c
+++ b/src/overlay104/ov104_0222ECE8.c
@@ -1114,7 +1114,7 @@ void ov104_0222F7BC (int param0, int param1, void * param2, void * param3)
 
     v0 = ov104_0223B7A8(v5->unk_10, 0);
     v3 = PokemonStructSize();
-    v4 = CallocMon(11);
+    v4 = AllocMonZeroed(11);
 
     for (v1 = 0; v1 < v0; v1++) {
         MI_CpuCopy8(&v6[v3 * v1], v4, v3);
@@ -1413,7 +1413,7 @@ void ov104_0222FB34 (int param0, int param1, void * param2, void * param3)
 
     v0 = ov104_0223BD70(v5->unk_10, 0);
     v3 = PokemonStructSize();
-    v4 = CallocMon(11);
+    v4 = AllocMonZeroed(11);
 
     for (v1 = 0; v1 < v0; v1++) {
         MI_CpuCopy8(&v6[v3 * v1], v4, v3);
diff --git a/src/overlay104/ov104_022332B4.c b/src/overlay104/ov104_022332B4.c
index 607ffcd8c6..7b3e78486b 100644
--- a/src/overlay104/ov104_022332B4.c
+++ b/src/overlay104/ov104_022332B4.c
@@ -305,7 +305,7 @@ BOOL ov104_022334DC (UnkStruct_ov104_0222E930 * param0)
         *v15 = v4->unk_3F0[v13].unk_04[v14];
         break;
     case 17:
-        v3 = CallocMon(11);
+        v3 = AllocMonZeroed(11);
         ov104_0222DF40(&v4->unk_3F0[v13], v3, ov104_0223ADA0(v4));
         *v15 = GetMonData(v3, MON_DATA_177, NULL);
         Heap_FreeToHeap(v3);
@@ -317,7 +317,7 @@ BOOL ov104_022334DC (UnkStruct_ov104_0222E930 * param0)
             v0[v10] = 0;
         }
 
-        v3 = CallocMon(11);
+        v3 = AllocMonZeroed(11);
 
         for (v10 = 0; v10 < v5; v10++) {
             ov104_0222DF40(&v4->unk_3F0[v10], v3, ov104_0223ADA0(v4));
diff --git a/src/overlay104/ov104_022339B4.c b/src/overlay104/ov104_022339B4.c
index 285cd55683..db92a636ff 100644
--- a/src/overlay104/ov104_022339B4.c
+++ b/src/overlay104/ov104_022339B4.c
@@ -188,7 +188,7 @@ static void ov104_02233BAC (UnkStruct_ov104_0223ADA0 * param0)
     }
 
     for (v0 = 0; v0 < 6; v0++) {
-        v4 = CallocMon(11);
+        v4 = AllocMonZeroed(11);
         ov104_0222DF40(&param0->unk_280[v0], v4, ov104_0223ADA0(param0));
         ov104_0222E1C0(param0->unk_4F8, param0->unk_4D4, v4);
         Heap_FreeToHeap(v4);
@@ -272,7 +272,7 @@ static void ov104_02233F1C (UnkStruct_ov104_0223ADA0 * param0)
 
     ov104_0222E330(v4, v6, v5, v7, NULL, 4, 11, 179);
 
-    v1 = CallocMon(11);
+    v1 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < 4; v0++) {
         ov104_0222DF40(&v4[v0], v1, ov104_0223ADA0(param0));
@@ -291,7 +291,7 @@ static void ov104_02233F1C (UnkStruct_ov104_0223ADA0 * param0)
 
     ov104_0222E330(v4, v6, v5, v7, NULL, 4, 11, 179);
 
-    v1 = CallocMon(11);
+    v1 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < 4; v0++) {
         ov104_0222DF40(&v4[v0], v1, ov104_0223ADA0(param0));
@@ -499,7 +499,7 @@ void ov104_0223449C (UnkStruct_ov104_0223ADA0 * param0)
 
     sub_0207A008(param0->unk_4D4);
 
-    v3 = CallocMon(11);
+    v3 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < v1; v0++) {
         ov104_0222DF40(&param0->unk_280[param0->unk_4DC[v0]], v3, ov104_0223ADA0(param0));
@@ -590,7 +590,7 @@ void ov104_0223470C (UnkStruct_ov104_0223ADA0 * param0)
 
     sub_0207A008(param0->unk_4D8);
 
-    v3 = CallocMon(11);
+    v3 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < v2; v0++) {
         ov104_0222DF40(&param0->unk_3F0[v0], v3, ov104_0223ADA0(param0));
diff --git a/src/overlay104/ov104_02234DB4.c b/src/overlay104/ov104_02234DB4.c
index a66d352d62..9aa1f55fe8 100644
--- a/src/overlay104/ov104_02234DB4.c
+++ b/src/overlay104/ov104_02234DB4.c
@@ -63,7 +63,7 @@ UnkStruct_ov104_0223B5C0 * ov104_02234DB4 (UnkStruct_021C0794 * param0, u16 para
     v10->unk_6FC = param0;
     v10->unk_00 = 11;
     v10->unk_264 = sub_02079FF4(11);
-    v10->unk_D8C = CallocMon(11);
+    v10->unk_D8C = AllocMonZeroed(11);
 
     v0 = v10->unk_6F8;
     v1 = sub_0203026C(param0);
diff --git a/src/overlay104/ov104_022361B4.c b/src/overlay104/ov104_022361B4.c
index 1100dfe579..c70708cd24 100644
--- a/src/overlay104/ov104_022361B4.c
+++ b/src/overlay104/ov104_022361B4.c
@@ -235,7 +235,7 @@ static void ov104_022365F8 (UnkStruct_ov104_0223BA10 * param0)
 
     ov104_0222E330(v4, v6, v5, NULL, v7, 4, 11, 179);
 
-    v2 = CallocMon(11);
+    v2 = AllocMonZeroed(11);
 
     for (v1 = 0; v1 < 4; v1++) {
         ov104_0222DF40(&v4[v1], v2, ov104_0223BA10(param0));
diff --git a/src/overlay104/ov104_02237DD8.c b/src/overlay104/ov104_02237DD8.c
index 78605e63c6..9f152a4edc 100644
--- a/src/overlay104/ov104_02237DD8.c
+++ b/src/overlay104/ov104_02237DD8.c
@@ -303,7 +303,7 @@ static void ov104_02238114 (UnkStruct_ov104_0223BFFC * param0)
 
     ov104_0222E330(v4, v6, v5, NULL, v7, 4, 11, 179);
 
-    v2 = CallocMon(11);
+    v2 = AllocMonZeroed(11);
 
     for (v1 = 0; v1 < 4; v1++) {
         ov104_0222DF40(&v4[v1], v2, ov104_0223BFFC(param0));
diff --git a/src/overlay104/ov104_0223A0C4.c b/src/overlay104/ov104_0223A0C4.c
index 821131e955..1c2da51f1f 100644
--- a/src/overlay104/ov104_0223A0C4.c
+++ b/src/overlay104/ov104_0223A0C4.c
@@ -919,7 +919,7 @@ UnkStruct_ov6_02240D5C * ov104_0223A580 (UnkStruct_0204AFC4 * param0, UnkStruct_
     v3->unk_128 = 18;
     v3->unk_12C = 18;
 
-    v6 = CallocMon(param0->unk_04);
+    v6 = AllocMonZeroed(param0->unk_04);
     v1 = 50;
 
     Party_InitWithCapacity(v3->unk_04[0], param0->unk_0E);
@@ -966,7 +966,7 @@ static void ov104_0223A6AC (UnkStruct_ov6_02240D5C * param0, UnkStruct_ov104_022
     Pokemon * v2;
 
     ov104_0222E284(param0, &param1->unk_00, param2, param3, param4);
-    v2 = CallocMon(param4);
+    v2 = AllocMonZeroed(param4);
 
     for (v0 = 0; v0 < param2; v0++) {
         ov104_0222DF40(&param1->unk_30[v0], v2, 120);
diff --git a/src/overlay104/ov104_0223A7F4.c b/src/overlay104/ov104_0223A7F4.c
index b676ade869..6b9758b42b 100644
--- a/src/overlay104/ov104_0223A7F4.c
+++ b/src/overlay104/ov104_0223A7F4.c
@@ -366,7 +366,7 @@ UnkStruct_ov6_02240D5C * ov104_0223ABA0 (UnkStruct_ov104_0223ADA0 * param0, UnkS
     v4->unk_12C = 19;
 
     Party_InitWithCapacity(v4->unk_04[0], v2);
-    v5 = CallocMon(11);
+    v5 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < v2; v0++) {
         sub_020775EC(Party_GetPokemonBySlotIndex(param0->unk_4D4, v0), v5);
@@ -386,7 +386,7 @@ UnkStruct_ov6_02240D5C * ov104_0223ABA0 (UnkStruct_ov104_0223ADA0 * param0, UnkS
         v4->unk_28[v0].unk_0C = ov104_0223AEE4(param0);
     }
 
-    v5 = CallocMon(11);
+    v5 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < v3; v0++) {
         sub_020775EC(Party_GetPokemonBySlotIndex(param0->unk_4D8, v0), v5);
@@ -409,7 +409,7 @@ UnkStruct_ov6_02240D5C * ov104_0223ABA0 (UnkStruct_ov104_0223ADA0 * param0, UnkS
         ov104_0222E284(v4, &v6, v3, 3, 11);
         Party_InitWithCapacity(v4->unk_04[3], ov104_0223AA74(param0->unk_04, 0));
 
-        v5 = CallocMon(11);
+        v5 = AllocMonZeroed(11);
 
         for (v0 = 0; v0 < v3; v0++) {
             sub_020775EC(Party_GetPokemonBySlotIndex(param0->unk_4D8, (v3 + v0)), v5);
@@ -456,7 +456,7 @@ void ov104_0223ADB0 (UnkStruct_ov104_0223ADA0 * param0)
     ov104_0222E330(param0->unk_280, param0->unk_254, param0->unk_260, param0->unk_268, NULL, 6, 11, 179);
     sub_0207A008(param0->unk_4D4);
 
-    v1 = CallocMon(11);
+    v1 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < 6; v0++) {
         ov104_0222DF40(&param0->unk_280[v0], v1, ov104_0223ADA0(param0));
@@ -482,7 +482,7 @@ void ov104_0223AE30 (UnkStruct_ov104_0223ADA0 * param0)
 
     ov104_0222E330(v3, param0->unk_584, param0->unk_590, param0->unk_598, NULL, 2, 11, 179);
 
-    v2 = CallocMon(11);
+    v2 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < 2; v0++) {
         ov104_0222DF40(&v3[v0], v2, ov104_0223ADA0(param0));
diff --git a/src/overlay104/ov104_0223AF58.c b/src/overlay104/ov104_0223AF58.c
index 4d4ab63010..1a35d2f879 100644
--- a/src/overlay104/ov104_0223AF58.c
+++ b/src/overlay104/ov104_0223AF58.c
@@ -1597,7 +1597,7 @@ UnkStruct_ov6_02240D5C * ov104_0223B250 (UnkStruct_ov104_0223B5C0 * param0, UnkS
     v8->unk_12C = 22;
     Party_InitWithCapacity(v8->unk_04[0], v4);
 
-    v9 = CallocMon(11);
+    v9 = AllocMonZeroed(11);
 
     for (v1 = 0; v1 < v4; v1++) {
         sub_020775EC(Party_GetPokemonBySlotIndex(v13, param0->unk_260[v1]), v9);
@@ -1627,7 +1627,7 @@ UnkStruct_ov6_02240D5C * ov104_0223B250 (UnkStruct_ov104_0223B5C0 * param0, UnkS
 
     ov104_0223B518(&param0->unk_290[v6], v7, param0->unk_18[v6], &param0->unk_268[v6], v5, 11, 180);
 
-    v9 = CallocMon(11);
+    v9 = AllocMonZeroed(11);
 
     for (v1 = 0; v1 < v5; v1++) {
         while (TRUE) {
@@ -1658,7 +1658,7 @@ UnkStruct_ov6_02240D5C * ov104_0223B250 (UnkStruct_ov104_0223B5C0 * param0, UnkS
         ov104_0222E284(v8, &v10, v5, 3, 11);
         Party_InitWithCapacity(v8->unk_04[3], v5);
 
-        v9 = CallocMon(11);
+        v9 = AllocMonZeroed(11);
 
         while (TRUE) {
             if (ov104_0223B4A4(param0, v6) == 0) {
diff --git a/src/overlay104/ov104_0223B6F4.c b/src/overlay104/ov104_0223B6F4.c
index 2b389f8ea9..a0de6c096f 100644
--- a/src/overlay104/ov104_0223B6F4.c
+++ b/src/overlay104/ov104_0223B6F4.c
@@ -189,7 +189,7 @@ UnkStruct_ov6_02240D5C * ov104_0223B810 (UnkStruct_ov104_0223BA10 * param0, UnkS
         v4 = 2;
     }
 
-    v6 = CallocMon(11);
+    v6 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < v2; v0++) {
         sub_020775EC(Party_GetPokemonBySlotIndex(param0->unk_28, (v4 + v0)), v6);
@@ -210,7 +210,7 @@ UnkStruct_ov6_02240D5C * ov104_0223B810 (UnkStruct_ov104_0223BA10 * param0, UnkS
         v5->unk_28[v0].unk_0C = ov104_0223BB10(param0);
     }
 
-    v6 = CallocMon(11);
+    v6 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < v3; v0++) {
         sub_020775EC(Party_GetPokemonBySlotIndex(param0->unk_2C, v0), v6);
@@ -233,7 +233,7 @@ UnkStruct_ov6_02240D5C * ov104_0223B810 (UnkStruct_ov104_0223BA10 * param0, UnkS
         ov104_0222E284(v5, &v7, v3, 3, 11);
         Party_InitWithCapacity(v5->unk_04[3], ov104_0223B7DC(param0->unk_10, 0));
 
-        v6 = CallocMon(11);
+        v6 = AllocMonZeroed(11);
 
         for (v0 = 0; v0 < v3; v0++) {
             sub_020775EC(Party_GetPokemonBySlotIndex(param0->unk_2C, (v3 + v0)), v6);
@@ -328,7 +328,7 @@ void ov104_0223BAB8 (UnkStruct_ov104_0223BA10 * param0)
     sub_0207A008(param0->unk_2C);
 
     v2 = ov104_0223B7DC(param0->unk_10, 1);
-    v3 = CallocMon(11);
+    v3 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < v2; v0++) {
         ov104_0222DF40(&param0->unk_288[v0], v3, ov104_0223BA10(param0));
diff --git a/src/overlay104/ov104_0223BCBC.c b/src/overlay104/ov104_0223BCBC.c
index 962ea7d789..46c54412ac 100644
--- a/src/overlay104/ov104_0223BCBC.c
+++ b/src/overlay104/ov104_0223BCBC.c
@@ -202,7 +202,7 @@ UnkStruct_ov6_02240D5C * ov104_0223BDD8 (UnkStruct_ov104_0223BFFC * param0, UnkS
         v4 = 2;
     }
 
-    v6 = CallocMon(11);
+    v6 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < v2; v0++) {
         sub_020775EC(Party_GetPokemonBySlotIndex(v12, (v4 + v0)), v6);
@@ -222,7 +222,7 @@ UnkStruct_ov6_02240D5C * ov104_0223BDD8 (UnkStruct_ov104_0223BFFC * param0, UnkS
         v5->unk_28[v0].unk_0C = ov104_0223C0D0(param0);
     }
 
-    v6 = CallocMon(11);
+    v6 = AllocMonZeroed(11);
 
     for (v0 = 0; v0 < v3; v0++) {
         sub_020775EC(Party_GetPokemonBySlotIndex(v13, v0), v6);
@@ -245,7 +245,7 @@ UnkStruct_ov6_02240D5C * ov104_0223BDD8 (UnkStruct_ov104_0223BFFC * param0, UnkS
         ov104_0222E284(v5, &v7, v3, 3, 11);
         Party_InitWithCapacity(v5->unk_04[3], ov104_0223BDA4(param0->unk_10, 0));
 
-        v6 = CallocMon(11);
+        v6 = AllocMonZeroed(11);
 
         for (v0 = 0; v0 < v3; v0++) {
             sub_020775EC(Party_GetPokemonBySlotIndex(v13, (v3 + v0)), v6);
@@ -319,7 +319,7 @@ void ov104_0223C04C (UnkStruct_ov104_0223BFFC * param0)
     sub_0207A008(param0->unk_74);
 
     v3 = ov104_0223BDA4(param0->unk_10, 1);
-    v5 = CallocMon(11);
+    v5 = AllocMonZeroed(11);
 
     for (v1 = 0; v1 < v3; v1++) {
         ov104_0222DF40(&param0->unk_330[v1], v5, ov104_0223BFFC(param0));
diff --git a/src/unk_0202F1D4.c b/src/unk_0202F1D4.c
index 03c93b536b..2a45b71c3d 100644
--- a/src/unk_0202F1D4.c
+++ b/src/unk_0202F1D4.c
@@ -601,7 +601,7 @@ static void sub_0202FD30 (UnkStruct_0202FD30 * param0, Party * param1)
     Pokemon * v1;
     u8 v2 = 0;
 
-    v1 = CallocMon(11);
+    v1 = AllocMonZeroed(11);
 
     Party_InitWithCapacity(param1, param0->unk_00);
 
diff --git a/src/unk_0203F6C4.c b/src/unk_0203F6C4.c
index d7225c0734..89fd015409 100644
--- a/src/unk_0203F6C4.c
+++ b/src/unk_0203F6C4.c
@@ -6901,7 +6901,7 @@ static BOOL sub_02045198 (UnkStruct_0203E724 * param0)
 static void sub_020451B4 (UnkStruct_0203CDB0 * param0, u16 param1)
 {
     UnkStruct_02026324 * v0 = sub_02027560(param0->unk_0C);
-    Pokemon * v1 = CallocMon(32);
+    Pokemon * v1 = AllocMonZeroed(32);
 
     ZeroMonData(v1);
     sub_02073D80(v1, param1, 50, 32, 0, 0, 0, 0);
diff --git a/src/unk_0204B830.c b/src/unk_0204B830.c
index ffbe9d09cd..c3e2fe16e2 100644
--- a/src/unk_0204B830.c
+++ b/src/unk_0204B830.c
@@ -293,7 +293,7 @@ static void sub_0204BAAC (UnkStruct_0203CDB0 * param0, void * param1)
         u32 v16 = sub_02025F20(v1);
         u32 v17 = sub_02025F30(v1);
 
-        v6 = CallocMon(32);
+        v6 = AllocMonZeroed(32);
 
         sub_020775EC(v4, v6);
         sub_02074B30(v6, 145, v15);
diff --git a/src/unk_0204C500.c b/src/unk_0204C500.c
index e3dd63dadd..5bddf58b13 100644
--- a/src/unk_0204C500.c
+++ b/src/unk_0204C500.c
@@ -48,7 +48,7 @@ BOOL sub_0204C500 (UnkStruct_0203E724 * param0)
 BOOL sub_0204C554 (UnkStruct_0203E724 * param0)
 {
     UnkStruct_02024440 * v0 = sub_02024440(param0->unk_34->unk_0C);
-    Pokemon * v1 = CallocMon(32);
+    Pokemon * v1 = AllocMonZeroed(32);
     u16 * v2 = inline_0204FCAC(param0);
 
     if (sub_0202F028(v0) == 6) {
@@ -65,7 +65,7 @@ BOOL sub_0204C59C (UnkStruct_0203E724 * param0)
 {
     UnkStruct_02024440 * v0 = sub_02024440(param0->unk_34->unk_0C);
     UnkStruct_020797DC * v1 = sub_02024420(param0->unk_34->unk_0C);
-    Pokemon * v2 = CallocMon(32);
+    Pokemon * v2 = AllocMonZeroed(32);
     UnkStruct_02025E6C * v3 = sub_02025E38(param0->unk_34->unk_0C);
     UnkStruct_02026324 * v4 = sub_02027560(param0->unk_34->unk_0C);
     BOOL v5;
diff --git a/src/unk_0204CFFC.c b/src/unk_0204CFFC.c
index 7a44289879..882c5787ab 100644
--- a/src/unk_0204CFFC.c
+++ b/src/unk_0204CFFC.c
@@ -103,7 +103,7 @@ BOOL sub_0204D154 (UnkStruct_0203E724 * param0)
     v1 = Party_GetCurrentCount(v3);
 
     if (v1 < 6) {
-        v4 = CallocMon(11);
+        v4 = AllocMonZeroed(11);
         ZeroMonData(v4);
 
         v0 = sub_02017070(1, v8);
diff --git a/src/unk_02051D8C.c b/src/unk_02051D8C.c
index 3bf3d34298..09e9af5891 100644
--- a/src/unk_02051D8C.c
+++ b/src/unk_02051D8C.c
@@ -178,7 +178,7 @@ UnkStruct_ov6_02240D5C * sub_02051F4C (int param0, const UnkStruct_0203CDB0 * pa
 
     v4->unk_138 = sub_02055BA8(param1);
     sub_0207D570(v4->unk_E0, 4, 20, param0);
-    v5 = CallocMon(param0);
+    v5 = AllocMonZeroed(param0);
 
     sub_02073D80(v5, sub_0206B08C(sub_020507E4(param1->unk_0C)), 5, 32, 0, 0, 2, 0);
     Party_AddPokemon(v4->unk_04[0], v5);
@@ -319,7 +319,7 @@ void sub_02052348 (UnkStruct_ov6_02240D5C * param0, const UnkStruct_0203CDB0 * p
     param0->unk_12C = 9;
 
     sub_02052184(param0, v2, 0);
-    v8 = CallocMon(11);
+    v8 = AllocMonZeroed(11);
     Party_InitWithCapacity(param0->unk_04[0], Party_GetCurrentCount(v3));
 
     for (v0 = 0; v0 < Party_GetCurrentCount(v3); v0++) {
@@ -388,7 +388,7 @@ void sub_020524E4 (UnkStruct_ov6_02240D5C * param0, const UnkStruct_0203CDB0 * p
         if (v10 == 0) {
             sub_02052164(param0, param2, 0);
         } else {
-            v9 = CallocMon(11);
+            v9 = AllocMonZeroed(11);
             Party_InitWithCapacity(param0->unk_04[0], v10);
 
             for (v8 = 0; v8 < v10; v8++) {
diff --git a/src/unk_02054884.c b/src/unk_02054884.c
index b485a97882..3a380feaad 100644
--- a/src/unk_02054884.c
+++ b/src/unk_02054884.c
@@ -38,7 +38,7 @@ BOOL sub_020548B0 (int param0, UnkStruct_021C0794 * param1, u16 param2, u8 param
 
     v4 = sub_02025E38(param1);
     v3 = Party_GetFromSavedata(param1);
-    v1 = CallocMon(param0);
+    v1 = AllocMonZeroed(param0);
 
     ZeroMonData(v1);
     sub_02073D80(v1, param2, param3, 32, 0, 0, 0, 0);
@@ -63,7 +63,7 @@ BOOL sub_02054930 (int param0, UnkStruct_021C0794 * param1, u16 param2, u8 param
     BOOL v1;
     UnkStruct_02025E6C * v2 = sub_02025E38(param1);
     Party * v3 = Party_GetFromSavedata(param1);
-    Pokemon * v4 = CallocMon(32);
+    Pokemon * v4 = AllocMonZeroed(32);
 
     ZeroMonData(v4);
 
diff --git a/src/unk_020562F8.c b/src/unk_020562F8.c
index 8835c79a09..2fa02a7bfb 100644
--- a/src/unk_020562F8.c
+++ b/src/unk_020562F8.c
@@ -141,7 +141,7 @@ static void sub_0205642C (UnkStruct_0203CDB0 * param0, UnkStruct_020564B4 * para
     UnkStruct_02024440 * v4;
 
     v4 = sub_02024440(param0->unk_0C);
-    v3 = CallocMon(4);
+    v3 = AllocMonZeroed(4);
 
     for (v0 = 0; v0 < 6; v0++) {
         param1->unk_30[v0] = 0;
@@ -274,7 +274,7 @@ static void sub_02056624 (UnkStruct_0203CDB0 * param0, UnkStruct_ov6_02240D5C *
 static UnkStruct_ov6_02240D5C * sub_0205664C (UnkStruct_0203CDB0 * param0, UnkStruct_020564B4 * param1)
 {
     UnkStruct_ov6_02240D5C * v0;
-    Pokemon * v1 = CallocMon(32);
+    Pokemon * v1 = AllocMonZeroed(32);
     UnkStruct_02024440 * v2 = sub_02024440(param0->unk_0C);
     int v3 = sub_020563BC(param0);
 
diff --git a/src/unk_0206C33C.c b/src/unk_0206C33C.c
index 540eff44bb..bdbb9d33f7 100644
--- a/src/unk_0206C33C.c
+++ b/src/unk_0206C33C.c
@@ -289,7 +289,7 @@ void sub_0206C41C (UnkStruct_021C0794 * param0, const u8 param1)
     sub_0202D980(v1, 6, v6);
 
     v4 = sub_02025E38(param0);
-    v0 = CallocMon(4);
+    v0 = AllocMonZeroed(4);
 
     ZeroMonData(v0);
     sub_02073D80(v0, v5, v6, 32, 0, 0, 1, sub_02025F24(v4));
diff --git a/src/unk_0206C660.c b/src/unk_0206C660.c
index 13a1088e17..c163ec6320 100644
--- a/src/unk_0206C660.c
+++ b/src/unk_0206C660.c
@@ -97,8 +97,8 @@ void sub_0206C740 (UnkStruct_020508D4 * param0, UnkStruct_ov6_02246204 * param1,
     v0->unk_04 = 0;
     v0->unk_00 = param1;
     v0->unk_08 = param2;
-    v0->unk_24 = CallocMon(param3);
-    v0->unk_28 = CallocMon(param3);
+    v0->unk_24 = AllocMonZeroed(param3);
+    v0->unk_28 = AllocMonZeroed(param3);
 
     sub_02050944(param0, sub_0206C680, v0);
 }
diff --git a/src/unk_02073C2C.c b/src/unk_02073C2C.c
index 49c13b53e0..b7cdf94155 100644
--- a/src/unk_02073C2C.c
+++ b/src/unk_02073C2C.c
@@ -116,7 +116,7 @@ static const s8 Unk_020F0695[][5] = {
 void ZeroMonData(Pokemon * param0);
 void ZeroBoxMonData(BoxPokemon * param0);
 int PokemonStructSize(void);
-Pokemon * CallocMon(u32 param0);
+Pokemon * AllocMonZeroed(u32 heapID);
 BOOL sub_02073C88(Pokemon * param0);
 BOOL sub_02073CD4(Pokemon * param0, BOOL param1);
 BOOL sub_02073D20(BoxPokemon * param0);
@@ -267,9 +267,9 @@ int PokemonStructSize (void)
     return sizeof(Pokemon);
 }
 
-Pokemon * CallocMon (u32 param0)
+Pokemon * AllocMonZeroed (u32 heapID)
 {
-    Pokemon * mon = Heap_AllocFromHeap(param0, sizeof(Pokemon));
+    Pokemon * mon = Heap_AllocFromHeap(heapID, sizeof(Pokemon));
     ZeroMonData(mon);
     return mon;
 }
@@ -4531,7 +4531,7 @@ void sub_020780C4 (Pokemon * param0, u32 param1)
     PokemonSubstruct2 * v7;
     PokemonSubstruct3 * v8;
 
-    v0 = CallocMon(0);
+    v0 = AllocMonZeroed(0);
 
     sub_020775EC(param0, v0);
 
diff --git a/src/unk_02079170.c b/src/unk_02079170.c
index 7cd980e38c..3659e526a1 100644
--- a/src/unk_02079170.c
+++ b/src/unk_02079170.c
@@ -302,7 +302,7 @@ static void sub_020793B8 (UnkStruct_ov6_02240D5C * param0, int param1, int param
     Party_InitWithCapacity(param0->unk_04[param1], 6);
 
     v0 = Heap_AllocFromHeap(param2, sizeof(UnkStruct_ov16_022431BC_3) * 6);
-    v7 = CallocMon(param2);
+    v7 = AllocMonZeroed(param2);
 
     sub_0207939C(param0->unk_18[param1], v0);
 
diff --git a/src/unk_0207AE68.c b/src/unk_0207AE68.c
index 3edd2a3684..dd428bd1f2 100644
--- a/src/unk_0207AE68.c
+++ b/src/unk_0207AE68.c
@@ -705,7 +705,7 @@ static void sub_0207C028 (UnkStruct_0207AE68 * param0)
                 UnkStruct_0202818C * v3;
                 UnkStruct_0202CA28 v4;
 
-                v1 = CallocMon(param0->unk_5C);
+                v1 = AllocMonZeroed(param0->unk_5C);
                 sub_020775EC(param0->unk_28, v1);
 
                 v2 = 292;
@@ -952,7 +952,7 @@ static void sub_0207C498 (UnkStruct_0207AE68 * param0)
     sub_02075EF4(&v0, param0->unk_28, 2);
 
     param0->unk_1C[0] = sub_02007C34(param0->unk_18, &v0, 128, 80, 0, 0, NULL, NULL);
-    v1 = CallocMon(param0->unk_5C);
+    v1 = AllocMonZeroed(param0->unk_5C);
 
     sub_020775EC(param0->unk_28, v1);
     sub_02074B30(v1, 5, (u8 *)&param0->unk_62);
diff --git a/src/unk_0208694C.c b/src/unk_0208694C.c
index e0a764ab74..dc015f490e 100644
--- a/src/unk_0208694C.c
+++ b/src/unk_0208694C.c
@@ -1141,7 +1141,7 @@ static int sub_02086F3C (UnkStruct_020067E8 * param0, int * param1)
         u16 v3[10 + 1];
         Pokemon * v4;
 
-        v4 = CallocMon(18);
+        v4 = AllocMonZeroed(18);
         sub_02073D80(v4, v0->unk_04, 5, 10, 10, 10, 10, 10);
         Heap_FreeToHeap(v4);
     }
@@ -1419,7 +1419,7 @@ static void sub_0208737C (UnkStruct_02087A10 * param0, UnkStruct_020067E8 * para
     if (param0->unk_00 == 1) {
         Pokemon * v1;
 
-        v1 = CallocMon(18);
+        v1 = AllocMonZeroed(18);
         sub_02073D80(v1, param0->unk_04, 5, 10, 10, 10, 10, 10);
         sub_0200B538(param0->unk_168, 0, sub_02076B10(v1));
         Heap_FreeToHeap(v1);
@@ -1485,7 +1485,7 @@ static void sub_02087544 (UnkStruct_02087A10 * param0, UnkStruct_020067E8 * para
         }
 
         if ((param0->unk_158 == 0) || sub_02086F14(param0->unk_D8)) {
-            Pokemon * v4 = CallocMon(18);
+            Pokemon * v4 = AllocMonZeroed(18);
 
             sub_02073D80(v4, param0->unk_04, 1, 0, 0, 0, 0, 0);
             sub_0200B538(param0->unk_168, 0, sub_02076B10(v4));
diff --git a/src/unk_0208C324.c b/src/unk_0208C324.c
index 5913388fab..cc9696f764 100644
--- a/src/unk_0208C324.c
+++ b/src/unk_0208C324.c
@@ -887,7 +887,7 @@ static int sub_0208CF78 (UnkStruct_0208D7BC * param0)
 
         if (param0->unk_24C->unk_11 == 2) {
             v0 = sub_0208DD48(param0);
-            v1 = CallocMon(19);
+            v1 = AllocMonZeroed(19);
             sub_020774C8(v0, v1);
         } else {
             v1 = sub_0208DD48(param0);
@@ -1012,7 +1012,7 @@ static void sub_0208D1A4 (UnkStruct_0208D7BC * param0)
 
 static void sub_0208D1D4 (UnkStruct_0208D7BC * param0, BoxPokemon * param1, UnkStruct_0208D1D4 * param2)
 {
-    Pokemon * v0 = CallocMon(19);
+    Pokemon * v0 = AllocMonZeroed(19);
 
     sub_020774C8(param1, v0);
     sub_0208D200(param0, v0, param2);
diff --git a/src/unk_0208FCF8.c b/src/unk_0208FCF8.c
index ed852ba70c..6313302f96 100644
--- a/src/unk_0208FCF8.c
+++ b/src/unk_0208FCF8.c
@@ -575,7 +575,7 @@ static void sub_020908CC (UnkStruct_0208D7BC * param0)
 
         if (param0->unk_24C->unk_11 == 2) {
             {
-                Pokemon * v3 = CallocMon(19);
+                Pokemon * v3 = AllocMonZeroed(19);
 
                 sub_020774C8(v1, v3);
                 sub_02090800(&param0->unk_244[0], v3, v2);
diff --git a/src/unk_020933F8.c b/src/unk_020933F8.c
index 0c178c41ef..8be5fab499 100644
--- a/src/unk_020933F8.c
+++ b/src/unk_020933F8.c
@@ -442,7 +442,7 @@ UnkStruct_02095C48 * sub_02093800 (const UnkStruct_02093800 * param0)
     v0->unk_148 = sub_02079FF4(20);
 
     for (v2 = 0; v2 < 4; v2++) {
-        v0->unk_00.unk_00[v2] = CallocMon(20);
+        v0->unk_00.unk_00[v2] = AllocMonZeroed(20);
     }
 
     for (v2 = 0; v2 < 4; v2++) {
diff --git a/src/unk_02097B18.c b/src/unk_02097B18.c
index c25ef58427..3a6287516f 100644
--- a/src/unk_02097B18.c
+++ b/src/unk_02097B18.c
@@ -94,7 +94,7 @@ static int sub_02097B18 (UnkStruct_020067E8 * param0, int * param1)
     v1 = sub_02006840(param0);
     v0->unk_00 = v1;
     v0->unk_42C = NARC_ctor(147, 53);
-    v0->unk_428 = CallocMon(53);
+    v0->unk_428 = AllocMonZeroed(53);
     v0->unk_D4.unk_00 = 0xFF;
     v0->unk_418.unk_00 = 0;