From 0fbeb64fcd15b9a0aa6281c7e2e625e627a8b412 Mon Sep 17 00:00:00 2001
From: AnonymousRandomPerson <chenghanngan.us@gmail.com>
Date: Fri, 12 Jun 2026 16:54:12 -0400
Subject: [PATCH] Decomped GetBaseFormCastformDeoxysCherrim

Decomped by @Zur3l
---
 .../{main_02054C24.inc => main_02054CD8.inc}  |  2 +-
 asm/{main_02054C24.s => main_02054CD8.s}      | 52 +------------------
 include/main_02054C24.h                       |  9 ++++
 main.lsf                                      |  3 +-
 src/main_02054C24.c                           | 23 ++++++++
 5 files changed, 36 insertions(+), 53 deletions(-)
 rename asm/include/{main_02054C24.inc => main_02054CD8.inc} (76%)
 rename asm/{main_02054C24.s => main_02054CD8.s} (52%)
 create mode 100644 include/main_02054C24.h
 create mode 100644 src/main_02054C24.c

diff --git a/asm/include/main_02054C24.inc b/asm/include/main_02054CD8.inc
similarity index 76%
rename from asm/include/main_02054C24.inc
rename to asm/include/main_02054CD8.inc
index 360e27e4..24f33e60 100644
--- a/asm/include/main_02054C24.inc
+++ b/asm/include/main_02054CD8.inc
@@ -1,6 +1,6 @@
 #pragma once
 .public FemaleToMaleForm
 .public GetBaseFormBurmyWormadamShellosGastrodonCherrim
+.public GetBaseFormCastformDeoxysCherrim
 .public GetDexNumber
-.public IsDeoxys
 .public IsUnown
diff --git a/asm/main_02054C24.s b/asm/main_02054CD8.s
similarity index 52%
rename from asm/main_02054C24.s
rename to asm/main_02054CD8.s
index 8f101238..91bfa7aa 100644
--- a/asm/main_02054C24.s
+++ b/asm/main_02054CD8.s
@@ -1,58 +1,8 @@
 	.include "asm/macros.inc"
-	.include "main_02054C24.inc"
+	.include "main_02054CD8.inc"
 
 	.text
 
-	arm_func_start GetBaseFormCastformDeoxysCherrim
-GetBaseFormCastformDeoxysCherrim: ; 0x02054C24
-	stmdb sp!, {r4, lr}
-	mov r4, r0
-	bl IsDeoxys
-	cmp r0, #0
-	ldrne r0, _02054CCC ; =0x000001A2
-	ldmneia sp!, {r4, pc}
-	ldr r1, _02054CD0 ; =0xFFFFFE85
-	add r0, r4, r1
-	mov r0, r0, lsl #0x10
-	mov r0, r0, asr #0x10
-	mov r0, r0, lsl #0x10
-	mov r0, r0, lsr #0x10
-	cmp r0, #3
-	rsbls r0, r1, #0
-	ldmlsia sp!, {r4, pc}
-	sub r0, r1, #0x258
-	add r0, r4, r0
-	mov r0, r0, lsl #0x10
-	mov r0, r0, asr #0x10
-	mov r0, r0, lsl #0x10
-	mov r0, r0, lsr #0x10
-	cmp r0, #3
-	rsbls r0, r1, #0x258
-	ldmlsia sp!, {r4, pc}
-	sub r0, r4, #0x1cc
-	mov r0, r0, lsl #0x10
-	mov r0, r0, asr #0x10
-	mov r0, r0, lsl #0x10
-	mov r0, r0, lsr #0x10
-	cmp r0, #1
-	movls r0, #0x1cc
-	ldmlsia sp!, {r4, pc}
-	ldr r0, _02054CD4 ; =0xFFFFFBDC
-	add r1, r4, r0
-	mov r1, r1, lsl #0x10
-	mov r1, r1, asr #0x10
-	mov r1, r1, lsl #0x10
-	mov r1, r1, lsr #0x10
-	cmp r1, #1
-	rsbls r4, r0, #0
-	mov r0, r4
-	ldmia sp!, {r4, pc}
-	.align 2, 0
-_02054CCC: .word 0x000001A2
-_02054CD0: .word 0xFFFFFE85
-_02054CD4: .word 0xFFFFFBDC
-	arm_func_end GetBaseFormCastformDeoxysCherrim
-
 	arm_func_start BaseFormsEqual
 BaseFormsEqual: ; 0x02054CD8
 	stmdb sp!, {r4, r5, r6, lr}
diff --git a/include/main_02054C24.h b/include/main_02054C24.h
new file mode 100644
index 00000000..ba881b6e
--- /dev/null
+++ b/include/main_02054C24.h
@@ -0,0 +1,9 @@
+#ifndef PMDSKY_MAIN_02054C24_H
+#define PMDSKY_MAIN_02054C24_H
+
+#include "enums.h"
+#include "util.h"
+
+enum monster_id GetBaseFormCastformDeoxysCherrim(enum monster_id monster_id);
+
+#endif //PMDSKY_MAIN_02054C24_H
diff --git a/main.lsf b/main.lsf
index 33bbb7ef..3042b299 100644
--- a/main.lsf
+++ b/main.lsf
@@ -139,7 +139,8 @@ Static main
 	Object src/main_02054AA4.o
 	Object asm/main_02054AD4.o
 	Object src/main_02054BE0.o
-	Object asm/main_02054C24.o
+	Object src/main_02054C24.o
+	Object asm/main_02054CD8.o
 	Object src/main_02054DC4.o
 	Object asm/main_02054E4C.o
 	Object src/main_02058C3C.o
diff --git a/src/main_02054C24.c b/src/main_02054C24.c
new file mode 100644
index 00000000..85c48db4
--- /dev/null
+++ b/src/main_02054C24.c
@@ -0,0 +1,23 @@
+#include "main_02054C24.h"
+
+extern bool8 IsDeoxys(enum monster_id monster_id);
+
+enum monster_id GetBaseFormCastformDeoxysCherrim(enum monster_id monster_id)
+{
+    if (IsDeoxys(monster_id)) {
+        return MONSTER_DEOXYS_NORMAL;
+    }
+    if ((u32) (u16) (s16) (monster_id + 0xFFFFFE85) <= 3U) {
+        return MONSTER_CASTFORM_NORMAL;
+    }
+    if ((u32) (u16) (s16) (monster_id - MONSTER_CASTFORM_NORMAL_SECONDARY) <= 3U) {
+        return MONSTER_CASTFORM_NORMAL_SECONDARY;
+    }
+    if ((u32) (u16) (s16) (monster_id - MONSTER_CHERRIM_OVERCAST) <= 1U) {
+        return MONSTER_CHERRIM_OVERCAST;
+    }
+    if ((u32) (u16) (s16) (monster_id + 0xFFFFFBDC) <= 1U) {
+        return MONSTER_CHERRIM_OVERCAST_SECONDARY;
+    }
+    return monster_id;
+}