diff --git a/asm/fldeff_teleport.s b/asm/fldeff_teleport.s
deleted file mode 100644
index 17bab1496..000000000
--- a/asm/fldeff_teleport.s
+++ /dev/null
@@ -1,84 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start SetUpFieldMove_Teleport
-SetUpFieldMove_Teleport: @ 817C8BC
-	push {lr}
-	ldr r0, =gMapHeader
-	ldrb r0, [r0, 0x17]
-	bl is_light_level_1_2_3_or_6
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _0817C8D8
-	movs r0, 0
-	b _0817C8E6
-	.pool
-_0817C8D8:
-	ldr r1, =gUnknown_03005DB0
-	ldr r0, =hm_add_c3_launch_phase_2
-	str r0, [r1]
-	ldr r1, =gUnknown_0203CEEC
-	ldr r0, =hm_teleport_run_dp02scr
-	str r0, [r1]
-	movs r0, 0x1
-_0817C8E6:
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end SetUpFieldMove_Teleport
-
-	thumb_func_start hm_teleport_run_dp02scr
-hm_teleport_run_dp02scr: @ 817C8FC
-	push {lr}
-	bl sub_808469C
-	movs r0, 0x3F
-	bl FieldEffectStart
-	bl GetCursorSelectionMonId
-	ldr r1, =gFieldEffectArguments
-	lsls r0, 24
-	lsrs r0, 24
-	str r0, [r1]
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end hm_teleport_run_dp02scr
-
-	thumb_func_start FldEff_UseTeleport
-FldEff_UseTeleport: @ 817C91C
-	push {lr}
-	bl oei_task_add
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, =gTasks
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	adds r1, r2
-	ldr r2, =sub_817C94C
-	lsrs r0, r2, 16
-	strh r0, [r1, 0x18]
-	strh r2, [r1, 0x1A]
-	movs r0, 0x1
-	bl SetPlayerAvatarTransitionFlags
-	movs r0, 0
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end FldEff_UseTeleport
-
-	thumb_func_start sub_817C94C
-sub_817C94C: @ 817C94C
-	push {lr}
-	movs r0, 0x3F
-	bl FieldEffectActiveListRemove
-	bl sub_80B7FC8
-	pop {r0}
-	bx r0
-	thumb_func_end sub_817C94C
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/ld_script.txt b/ld_script.txt
index e71b63e6c..a3c4b498e 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -226,7 +226,7 @@ SECTIONS {
         asm/intro_credits_graphics.o(.text);
         src/evolution_graphics.o(.text);
         src/bard_music.o(.text);
-        asm/fldeff_teleport.o(.text);
+        src/fldeff_teleport.o(.text);
         asm/battle_link_817C95C.o(.text);
         asm/pokemon_animation.o(.text);
         src/recorded_battle.o(.text);
diff --git a/src/fldeff_teleport.c b/src/fldeff_teleport.c
new file mode 100644
index 000000000..3ca72d787
--- /dev/null
+++ b/src/fldeff_teleport.c
@@ -0,0 +1,54 @@
+#include "global.h"
+#include "field_effect.h"
+#include "task.h"
+
+extern bool8 is_light_level_1_2_3_or_6(u8 mapType);
+extern void* hm_add_c3_launch_phase_2(void);
+extern void hm_teleport_run_dp02scr(void);
+extern void* gUnknown_0203CEEC;
+extern void* gUnknown_03005DB0;
+extern void sub_808469C(void);
+extern u8 GetCursorSelectionMonId(void);
+extern void sub_817C94C(void);
+extern u8 oei_task_add(void);
+extern void FieldEffectActiveListRemove(u8 id);
+extern void sub_80B7FC8(void);
+
+// 817C8BC
+bool8 SetUpFieldMove_Teleport()
+{
+    if (is_light_level_1_2_3_or_6(gMapHeader.mapType) == TRUE)
+    {
+        gUnknown_03005DB0 = hm_add_c3_launch_phase_2;
+        gUnknown_0203CEEC = hm_teleport_run_dp02scr;   
+        return TRUE;
+    } 
+    return FALSE;
+}
+
+// 817C8FC
+void hm_teleport_run_dp02scr()
+{
+    sub_808469C();
+    FieldEffectStart(0x3F);
+    gFieldEffectArguments[0] = (u32)GetCursorSelectionMonId();
+}
+
+extern void SetPlayerAvatarTransitionFlags(u8);
+// 817C91C
+u8 FldEff_UseTeleport()
+{
+    u8 taskID = oei_task_add();
+    gTasks[taskID].data[8] = (u32)sub_817C94C >> 16;
+    gTasks[taskID].data[9] = (u32)sub_817C94C;
+    SetPlayerAvatarTransitionFlags(1);
+    return 0;
+}
+
+void sub_817C94C()
+{
+    FieldEffectActiveListRemove(0x3F);
+    sub_80B7FC8();
+}
+
+