diff --git a/asm/include/main_0205BD90.inc b/asm/include/main_0205BFB0.inc
similarity index 99%
rename from asm/include/main_0205BD90.inc
rename to asm/include/main_0205BFB0.inc
index adc7212e..2cda36ab 100644
--- a/asm/include/main_0205BD90.inc
+++ b/asm/include/main_0205BFB0.inc
@@ -9,7 +9,6 @@
 .public CopyBitsFrom
 .public CopyBitsTo
 .public CopyFrameTypeOption
-.public CopyMovesetFrom
 .public CopyMovesetTo
 .public CreateCollectionMenu
 .public CreatePortraitBox
@@ -262,7 +261,6 @@
 .public _022B7310
 .public _022B7320
 .public _s32_div_f
-.public memset
 .public ov00_022BE0C8
 .public ov01_02337B3C
 .public ov01_02337B68
@@ -381,7 +379,6 @@
 .public sub_02056914
 .public sub_02056D70
 .public sub_02056E04
-.public sub_02059AE8
 .public sub_02059AF8
 .public sub_0205B44C
 .public sub_0205B77C
diff --git a/asm/main_0205BD90.s b/asm/main_0205BFB0.s
similarity index 99%
rename from asm/main_0205BD90.s
rename to asm/main_0205BFB0.s
index c1d1073f..a2399139 100644
--- a/asm/main_0205BD90.s
+++ b/asm/main_0205BFB0.s
@@ -1,155 +1,8 @@
 	.include "asm/macros.inc"
-	.include "main_0205BD90.inc"
+	.include "main_0205BFB0.inc"
 
 	.text
 
-	arm_func_start sub_0205BD90
-sub_0205BD90: ; 0x0205BD90
-	and r0, r0, #1
-	orr r0, r0, #2
-	bx lr
-	arm_func_end sub_0205BD90
-
-	arm_func_start sub_0205BD9C
-sub_0205BD9C: ; 0x0205BD9C
-	stmdb sp!, {r3, r4, r5, r6, r7, lr}
-	sub sp, sp, #0x10
-	mov r3, r0
-	mov r2, r1
-	add r0, sp, #0
-	mov r1, r3
-	bl sub_02050974
-	ldr r1, _0205BFA8 ; =_022B57BC
-	add r0, sp, #0
-	mov r2, #0x20
-	bl CopyBitsFrom
-	ldr r5, _0205BFAC ; =_020B0A54
-	mov r7, #0
-	add r6, sp, #0
-	mov r4, #0xb0
-_0205BDD8:
-	ldr r1, [r5]
-	mov r0, r6
-	mla r1, r7, r4, r1
-	bl sub_0205C19C
-	add r7, r7, #1
-	cmp r7, #0x20
-	blt _0205BDD8
-	ldr r0, _0205BFAC ; =_020B0A54
-	mov r1, #0
-	ldr r4, [r0, #8]
-	mov r2, #0x44
-	mov r0, r4
-	bl memset
-	add r0, sp, #0
-	mov r1, r4
-	mov r2, #4
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #1
-	mov r2, #7
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #2
-	bl Copy16BitsFrom
-	add r0, sp, #0
-	add r1, r4, #4
-	mov r2, #0xb
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #6
-	bl sub_02059AE8
-	add r0, sp, #0
-	add r1, r4, #7
-	bl sub_02059AE8
-	add r0, sp, #0
-	add r1, r4, #8
-	mov r2, #0xa
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0xa
-	mov r2, #0xa
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0xc
-	mov r2, #8
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0xd
-	mov r2, #8
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0xe
-	mov r2, #8
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0xf
-	mov r2, #8
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0x10
-	mov r2, #0x18
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0x14
-	mov r2, #0x45
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0x20
-	mov r2, #4
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0x22
-	bl CopyMovesetFrom
-	add r0, sp, #0
-	add r1, r4, #0x3a
-	mov r2, #0x50
-	bl CopyBitsFrom
-	ldr r0, _0205BFAC ; =_020B0A54
-	mov r1, #0
-	ldr r4, [r0, #8]
-	mov r2, #6
-	add r0, r4, #0x44
-	bl memset
-	add r0, sp, #0
-	add r1, r4, #0x46
-	mov r2, #0xb
-	bl CopyBitsFrom
-	add r0, sp, #0
-	add r1, r4, #0x48
-	mov r2, #0xb
-	bl CopyBitsFrom
-	ldr r1, _0205BFAC ; =_020B0A54
-	add r0, sp, #0
-	ldr r1, [r1, #4]
-	mov r2, #0x20
-	bl CopyBitsFrom
-	ldr r4, _0205BFAC ; =_020B0A54
-	mov r7, #0
-	add r6, sp, #0
-	mov r5, #0x40
-_0205BF68:
-	ldr r1, [r4, #4]
-	mov r0, r6
-	add r1, r1, #4
-	mov r2, r5
-	add r1, r1, r7, lsl #3
-	bl CopyBitsFrom
-	add r7, r7, #1
-	cmp r7, #0x20
-	blt _0205BF68
-	add r0, sp, #0
-	bl sub_020509BC
-	bl Rand16Bit
-	bl sub_020634F4
-	ldr r0, [sp, #8]
-	add sp, sp, #0x10
-	ldmia sp!, {r3, r4, r5, r6, r7, pc}
-	.align 2, 0
-_0205BFA8: .word _022B57BC
-_0205BFAC: .word _020B0A54
-	arm_func_end sub_0205BD9C
-
 	arm_func_start sub_0205BFB0
 sub_0205BFB0: ; 0x0205BFB0
 	stmdb sp!, {r3, r4, r5, r6, r7, lr}
diff --git a/include/main_0205B690.h b/include/main_0205B690.h
index 3e3d7018..c0f834fb 100644
--- a/include/main_0205B690.h
+++ b/include/main_0205B690.h
@@ -15,7 +15,8 @@ union unkStruct_020B0A54_unk8 {
 
 struct unkStruct_020B0A54 {
     u8 unk0;
-    u8 unk1[7];
+    u8 unk1[3];
+    u32 unk4;
     union unkStruct_020B0A54_unk8 unk8;
     u8 unkC[150];
     u16 unkA2;
diff --git a/include/main_0205BD14.h b/include/main_0205BD14.h
index 42f68a7a..e4b5e6ee 100644
--- a/include/main_0205BD14.h
+++ b/include/main_0205BD14.h
@@ -7,5 +7,7 @@ void sub_0205BD14(u32 *dest, s32 index);
 u32 sub_0205BD40(u32 val);
 bool8 sub_0205BD5C(u32 val);
 u8 sub_0205BD78(void);
+u32 sub_0205BD90(u32 a0);
+u32 sub_0205BD9C(u32 arg0, u32 arg1);
 
 #endif //PMDSKY_MAIN_0205BD14_H
diff --git a/main.lsf b/main.lsf
index 6b81771d..a19e892a 100644
--- a/main.lsf
+++ b/main.lsf
@@ -158,7 +158,7 @@ Static main
 	Object src/main_0205BBFC.o
 	Object asm/main_0205BCC4.o
 	Object src/main_0205BD14.o
-	Object asm/main_0205BD90.o
+	Object asm/main_0205BFB0.o
 	Object src/dungeon_init_2.o
 	Object asm/main_0206A750.o
 	Object src/main_0206C98C.o
diff --git a/src/main_0205BD14.c b/src/main_0205BD14.c
index b5520756..6c93235a 100644
--- a/src/main_0205BD14.c
+++ b/src/main_0205BD14.c
@@ -1,8 +1,21 @@
 #include "main_0205BD14.h"
+#include "common.h"
 #include "main_0200224C.h"
+#include "main_02058FA4.h"
+#include "main_02059A74.h"
 #include "main_0205B690.h"
 
 extern union unkStruct_020B0A54_union _020B0A54;
+extern u32 _022B57BC;
+
+extern void sub_02050974(void *v0, u32 v1, u32 v2);
+extern void CopyBitsFrom(void *read_info, void *buf_read, s32 nbits);
+extern void sub_0205C19C(struct  WriteMonsterInfoToSave_struct *temp, void *src);
+extern void* memset(void *s, s32 c, u32 n);
+extern void Copy16BitsFrom(void *read_info, void *buf_read);
+extern void CopyMovesetFrom(struct WriteMonsterInfoToSave_struct *read_info, void *dst);
+extern void sub_020509BC(struct  WriteMonsterInfoToSave_struct *temp);
+extern void sub_020634F4(void);
 
 void sub_0205BD14(u32 *dest, s32 index)
 {
@@ -28,3 +41,61 @@ u8 sub_0205BD78(void)
 {
     return RandInt(2) | 2;
 }
+
+u32 sub_0205BD90(u32 a0)
+{
+    return a0 & 1 | 2;
+}
+
+u32 sub_0205BD9C(u32 arg0, u32 arg1)
+{
+    struct WriteMonsterInfoToSave_struct temp;
+    struct ground_monster *monster;
+
+    sub_02050974(&temp, arg0, arg1);
+    CopyBitsFrom(&temp, &_022B57BC, 32);
+
+    for (s32 i = 0; i < 32; i++)
+    {
+        sub_0205C19C(&temp, &_020B0A54.struct0[i]);
+    }
+
+    monster = _020B0A54.struct1.unk8.monster;
+    memset(monster, 0, 68);
+
+    CopyBitsFrom(&temp, &monster->is_valid, 4);
+    CopyBitsFrom(&temp, &monster->level, 7);
+    Copy16BitsFrom(&temp, &monster->joined_at);
+    CopyBitsFrom(&temp, &monster->id, 11);
+    sub_02059AE8(&temp, &monster->level_at_first_evo);
+    sub_02059AE8(&temp, &monster->level_at_second_evo);
+    CopyBitsFrom(&temp, &monster->iq, 10);
+    CopyBitsFrom(&temp, &monster->max_hp, 10);
+    CopyBitsFrom(&temp, &monster->offensive_stats[0], 8);
+    CopyBitsFrom(&temp, &monster->offensive_stats[1], 8);
+    CopyBitsFrom(&temp, &monster->defensive_stats[0], 8);
+    CopyBitsFrom(&temp, &monster->defensive_stats[1], 8);
+    CopyBitsFrom(&temp, &monster->exp, 24);
+    CopyBitsFrom(&temp, &monster->iq_skill_flags, 69);
+    CopyBitsFrom(&temp, &monster->tactic, 4);
+    CopyMovesetFrom(&temp, monster->moves);
+    CopyBitsFrom(&temp, monster->name, 80);
+
+    struct unkStruct_020B0A54_unk8_inner *inner = _020B0A54.struct1.unk8.unk8;
+    memset(&inner->unk44, 0, 6);
+    CopyBitsFrom(&temp, &inner->unk46, 11);
+    CopyBitsFrom(&temp, &inner->unk48, 11);
+
+    CopyBitsFrom(&temp, (void*) _020B0A54.struct1.unk4, 32);
+
+    for (s32 i = 0; i < 32; i++)
+    {
+        CopyBitsFrom(&temp, _020B0A54.fp[1] + 4 + (i * 8), 64);
+    }
+
+    sub_020509BC(&temp);
+    Rand16Bit();
+    sub_020634F4();
+
+    return temp.result;
+}