diff --git a/asm/include/overlay_29_022E9618.inc b/asm/include/overlay_29_022E9618.inc
index 22602b4e..a1688bb0 100644
--- a/asm/include/overlay_29_022E9618.inc
+++ b/asm/include/overlay_29_022E9618.inc
@@ -9,7 +9,6 @@
 .public DISPLACEMENTS_WITHIN_3
 .public DisplayUi
 .public DUNGEON_PRNG_STATE
-.public DUNGEON_PRNG_STATE_SECONDARY_VALUES
 .public DUNGEON_PTR
 .public DungeonRandInt
 .public EntityIsValid__022E95F4
diff --git a/asm/include/overlay_29_022EAA20.inc b/asm/include/overlay_29_022EAA20.inc
new file mode 100644
index 00000000..b8c60004
--- /dev/null
+++ b/asm/include/overlay_29_022EAA20.inc
@@ -0,0 +1,3 @@
+#pragma once
+.public DUNGEON_PRNG_STATE
+.public DUNGEON_PRNG_STATE_SECONDARY_VALUES
diff --git a/asm/main_02000DE0.s b/asm/main_02000DE0.s
index 7066389c..0c43734c 100644
--- a/asm/main_02000DE0.s
+++ b/asm/main_02000DE0.s
@@ -1942,6 +1942,7 @@ _020025F0: .word _0229AFC0
 _020025F4: .word _0229AFE4
 	arm_func_end sub_02002580
 
+; https://decomp.me/scratch/mYHOs
 	arm_func_start sub_020025F8
 sub_020025F8: ; 0x020025F8
 	stmdb sp!, {r4, lr}
diff --git a/asm/main_02003DB8.s b/asm/main_02003DB8.s
index acfeda77..1aa14e5c 100644
--- a/asm/main_02003DB8.s
+++ b/asm/main_02003DB8.s
@@ -5150,6 +5150,7 @@ _02008160:
 	ldmia sp!, {r3, pc}
 	arm_func_end sub_02008138
 
+; https://decomp.me/scratch/w0Zq6
 	arm_func_start FileRom_InitDataTransfer
 FileRom_InitDataTransfer: ; 0x02008168
 	stmdb sp!, {r3, lr}
diff --git a/asm/overlay_29_022E9618.s b/asm/overlay_29_022E9618.s
index 709bad74..ecc7e81f 100644
--- a/asm/overlay_29_022E9618.s
+++ b/asm/overlay_29_022E9618.s
@@ -1562,59 +1562,3 @@ SetDungeonRngPreseed: ; 0x022EA9DC
 	.align 2, 0
 _022EA9E8: .word DUNGEON_PRNG_STATE
 	arm_func_end SetDungeonRngPreseed
-
-	arm_func_start InitDungeonRng
-InitDungeonRng: ; 0x022EA9EC
-	ldr r1, _022EAA18 ; =DUNGEON_PRNG_STATE
-	orr r2, r0, #1
-	str r2, [r1, #0xc]
-	mov r2, #0
-	str r2, [r1, #4]
-	ldr r1, _022EAA1C ; =DUNGEON_PRNG_STATE_SECONDARY_VALUES
-_022EAA04:
-	str r0, [r1, r2, lsl #2]
-	add r2, r2, #1
-	cmp r2, #5
-	blt _022EAA04
-	bx lr
-	.align 2, 0
-_022EAA18: .word DUNGEON_PRNG_STATE
-_022EAA1C: .word DUNGEON_PRNG_STATE_SECONDARY_VALUES
-	arm_func_end InitDungeonRng
-
-	arm_func_start DungeonRand16Bit
-DungeonRand16Bit: ; 0x022EAA20
-	stmdb sp!, {r3, lr}
-	ldr r1, _022EAA88 ; =DUNGEON_PRNG_STATE
-	ldrb r0, [r1]
-	cmp r0, #0
-	ldr r0, _022EAA8C ; =0x5D588B65
-	beq _022EAA5C
-	ldr lr, [r1, #0x10]
-	ldr r3, _022EAA90 ; =DUNGEON_PRNG_STATE_SECONDARY_VALUES
-	ldr r1, _022EAA94 ; =0x00269EC3
-	ldr r2, [r3, lr, lsl #2]
-	umull ip, r0, r2, r0
-	adds r1, ip, r1
-	mov r0, r1, lsl #0x10
-	str r1, [r3, lr, lsl #2]
-	b _022EAA80
-_022EAA5C:
-	ldr r2, [r1, #4]
-	add r2, r2, #1
-	str r2, [r1, #4]
-	ldr r2, [r1, #0xc]
-	mul r0, r2, r0
-	add r2, r0, #1
-	mov r0, r2, lsr #0x10
-	mov r0, r0, lsl #0x10
-	str r2, [r1, #0xc]
-_022EAA80:
-	mov r0, r0, lsr #0x10
-	ldmia sp!, {r3, pc}
-	.align 2, 0
-_022EAA88: .word DUNGEON_PRNG_STATE
-_022EAA8C: .word 0x5D588B65
-_022EAA90: .word DUNGEON_PRNG_STATE_SECONDARY_VALUES
-_022EAA94: .word 0x00269EC3
-	arm_func_end DungeonRand16Bit
diff --git a/asm/overlay_29_022EAA20.s b/asm/overlay_29_022EAA20.s
new file mode 100644
index 00000000..10a98a1d
--- /dev/null
+++ b/asm/overlay_29_022EAA20.s
@@ -0,0 +1,42 @@
+	.include "asm/macros.inc"
+	.include "overlay_29_022EAA20.inc"
+
+	.text
+
+; https://decomp.me/scratch/UiD3J
+	arm_func_start DungeonRand16Bit
+DungeonRand16Bit: ; 0x022EAA20
+	stmdb sp!, {r3, lr}
+	ldr r1, _022EAA88 ; =DUNGEON_PRNG_STATE
+	ldrb r0, [r1]
+	cmp r0, #0
+	ldr r0, _022EAA8C ; =0x5D588B65
+	beq _022EAA5C
+	ldr lr, [r1, #0x10]
+	ldr r3, _022EAA90 ; =DUNGEON_PRNG_STATE_SECONDARY_VALUES
+	ldr r1, _022EAA94 ; =0x00269EC3
+	ldr r2, [r3, lr, lsl #2]
+	umull ip, r0, r2, r0
+	adds r1, ip, r1
+	mov r0, r1, lsl #0x10
+	str r1, [r3, lr, lsl #2]
+	b _022EAA80
+_022EAA5C:
+	ldr r2, [r1, #4]
+	add r2, r2, #1
+	str r2, [r1, #4]
+	ldr r2, [r1, #0xc]
+	mul r0, r2, r0
+	add r2, r0, #1
+	mov r0, r2, lsr #0x10
+	mov r0, r0, lsl #0x10
+	str r2, [r1, #0xc]
+_022EAA80:
+	mov r0, r0, lsr #0x10
+	ldmia sp!, {r3, pc}
+	.align 2, 0
+_022EAA88: .word DUNGEON_PRNG_STATE
+_022EAA8C: .word 0x5D588B65
+_022EAA90: .word DUNGEON_PRNG_STATE_SECONDARY_VALUES
+_022EAA94: .word 0x00269EC3
+	arm_func_end DungeonRand16Bit
diff --git a/include/overlay_29_022EA9EC.h b/include/overlay_29_022EA9EC.h
new file mode 100644
index 00000000..adb012b5
--- /dev/null
+++ b/include/overlay_29_022EA9EC.h
@@ -0,0 +1,6 @@
+#ifndef PMDSKY_OVERLAY_29_022EA9EC_H
+#define PMDSKY_OVERLAY_29_022EA9EC_H
+
+void InitDungeonRng(u32 seed);
+
+#endif //PMDSKY_OVERLAY_29_022EA9EC_H
diff --git a/main.lsf b/main.lsf
index 73009aeb..95725160 100644
--- a/main.lsf
+++ b/main.lsf
@@ -230,6 +230,8 @@ Overlay OVY_29
 	Object asm/overlay_29_022E37DC.o
 	Object src/dg_uty.o
 	Object asm/overlay_29_022E9618.o
+	Object src/overlay_29_022EA9EC.o
+	Object asm/overlay_29_022EAA20.o
 	Object src/dg_random.o
 	Object asm/overlay_29_022EAB50.o
 	Object src/overlay_29_022EC608.o
diff --git a/src/overlay_29_022EA9EC.c b/src/overlay_29_022EA9EC.c
new file mode 100644
index 00000000..b8d0c1c3
--- /dev/null
+++ b/src/overlay_29_022EA9EC.c
@@ -0,0 +1,14 @@
+#include "overlay_29_022EA9EC.h"
+
+extern u32 DUNGEON_PRNG_STATE[];
+extern u32 DUNGEON_PRNG_STATE_SECONDARY_VALUES[];
+
+void InitDungeonRng(u32 seed) {
+    DUNGEON_PRNG_STATE[3] = seed|1;
+    s32 scratch_0 = 0;
+    DUNGEON_PRNG_STATE[1] = scratch_0;
+    do {
+        DUNGEON_PRNG_STATE_SECONDARY_VALUES[scratch_0]=seed;
+        scratch_0++;
+    } while (scratch_0<5);
+}