diff --git a/asm/pokenav.s b/asm/pokenav.s
index ae792ae76..d14388ed5 100644
--- a/asm/pokenav.s
+++ b/asm/pokenav.s
@@ -20700,202 +20700,6 @@ _081D156A:
 // MATCH CALL
 	.section .text.after.match.call
 
-	thumb_func_start sub_81D15BC
-sub_81D15BC: @ 81D15BC
-	ldr r1, =gRematchTable
-	lsls r0, 4
-	adds r0, r1
-	ldrh r0, [r0]
-	bx lr
-	.pool
-	thumb_func_end sub_81D15BC
-
-	thumb_func_start sub_81D15CC
-sub_81D15CC: @ 81D15CC
-	push {lr}
-	adds r3, r0, 0
-	movs r1, 0
-	ldr r2, =gRematchTable
-_081D15D4:
-	ldrh r0, [r2]
-	cmp r0, r3
-	bne _081D15E4
-	adds r0, r1, 0
-	b _081D15F0
-	.pool
-_081D15E4:
-	adds r2, 0x10
-	adds r1, 0x1
-	cmp r1, 0x4D
-	ble _081D15D4
-	movs r0, 0x1
-	negs r0, r0
-_081D15F0:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D15CC
-
-	thumb_func_start sub_81D15F4
-sub_81D15F4: @ 81D15F4
-	push {r4,lr}
-	cmp r0, 0x14
-	bhi _081D1620
-	ldr r1, =gUnknown_086252A8
-	lsls r0, 2
-	adds r0, r1
-	ldr r4, [r0]
-	adds r0, r4, 0
-	bl sub_81D1574
-	ldr r1, =gUnknown_086252FC
-	lsls r0, 2
-	adds r0, r1
-	ldr r1, [r0]
-	adds r0, r4, 0
-	bl _call_via_r1
-	b _081D1622
-	.pool
-_081D1620:
-	movs r0, 0
-_081D1622:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D15F4
-
-	thumb_func_start sub_81D1628
-sub_81D1628: @ 81D1628
-	push {lr}
-	adds r2, r0, 0
-	ldrh r1, [r2, 0x2]
-	ldr r0, =0x0000ffff
-	cmp r1, r0
-	beq _081D1644
-	adds r0, r1, 0
-	bl FlagGet
-	lsls r0, 24
-	lsrs r0, 24
-	b _081D1646
-	.pool
-_081D1644:
-	movs r0, 0x1
-_081D1646:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D1628
-
-	thumb_func_start sub_81D164C
-sub_81D164C: @ 81D164C
-	push {lr}
-	adds r2, r0, 0
-	ldrh r1, [r2, 0x2]
-	ldr r0, =0x0000ffff
-	cmp r1, r0
-	beq _081D1668
-	adds r0, r1, 0
-	bl FlagGet
-	lsls r0, 24
-	lsrs r0, 24
-	b _081D166A
-	.pool
-_081D1668:
-	movs r0, 0x1
-_081D166A:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D164C
-
-	thumb_func_start sub_81D1670
-sub_81D1670: @ 81D1670
-	push {lr}
-	adds r2, r0, 0
-	ldrh r1, [r2, 0x2]
-	ldr r0, =0x0000ffff
-	cmp r1, r0
-	beq _081D168C
-	adds r0, r1, 0
-	bl FlagGet
-	lsls r0, 24
-	lsrs r0, 24
-	b _081D168E
-	.pool
-_081D168C:
-	movs r0, 0x1
-_081D168E:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D1670
-
-	thumb_func_start sub_81D1694
-sub_81D1694: @ 81D1694
-	push {lr}
-	adds r2, r0, 0
-	ldr r0, =gSaveBlock2Ptr
-	ldr r1, [r0]
-	ldrb r0, [r2, 0x1]
-	ldrb r1, [r1, 0x8]
-	cmp r0, r1
-	beq _081D16AC
-	movs r0, 0
-	b _081D16C6
-	.pool
-_081D16AC:
-	ldrh r1, [r2, 0x2]
-	ldr r0, =0x0000ffff
-	cmp r1, r0
-	beq _081D16C4
-	adds r0, r1, 0
-	bl FlagGet
-	lsls r0, 24
-	lsrs r0, 24
-	b _081D16C6
-	.pool
-_081D16C4:
-	movs r0, 0x1
-_081D16C6:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D1694
-
-	thumb_func_start sub_81D16CC
-sub_81D16CC: @ 81D16CC
-	push {lr}
-	ldrh r0, [r0, 0x2]
-	bl FlagGet
-	lsls r0, 24
-	lsrs r0, 24
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D16CC
-
-	thumb_func_start sub_81D16DC
-sub_81D16DC: @ 81D16DC
-	push {r4,lr}
-	cmp r0, 0x14
-	bhi _081D170C
-	ldr r1, =gUnknown_086252A8
-	lsls r0, 2
-	adds r0, r1
-	ldr r4, [r0]
-	adds r0, r4, 0
-	bl sub_81D1574
-	ldr r1, =gUnknown_08625310
-	lsls r0, 2
-	adds r0, r1
-	ldr r1, [r0]
-	adds r0, r4, 0
-	bl _call_via_r1
-	lsls r0, 24
-	lsrs r0, 24
-	b _081D170E
-	.pool
-_081D170C:
-	movs r0, 0
-_081D170E:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D16DC
-
 	thumb_func_start sub_81D1714
 sub_81D1714: @ 81D1714
 	ldrb r0, [r0, 0x1]
diff --git a/src/match_call.c b/src/match_call.c
index d435ea8a6..8267d08be 100644
--- a/src/match_call.c
+++ b/src/match_call.c
@@ -1,20 +1,37 @@
 
 // Includes
 #include "global.h"
+#include "battle_setup.h"
+#include "event_data.h"
+
+#define NELEMS(a) (s32)( sizeof (a) / sizeof (*(a)) )
 
 // Static type declarations
 
+typedef struct {
+    u8 v0;
+    u8 v1;
+    u16 v2;
+    void *v4;
+    void *v8;
+    void *vC;
+} match_call_t;
+
 // Static RAM declarations
 
 // Static ROM declarations
 
 // .rodata
 
+extern const void *const gUnknown_086252A8[];
+extern bool32 (*const gUnknown_086252FC[])(const match_call_t *);
+extern bool8 (*const gUnknown_08625310[])(const match_call_t *);
+
 // .text
 
-u32 sub_81D1574(u8 *a)
+s32 sub_81D1574(const match_call_t *matchCall)
 {
-    switch (*a)
+    switch (matchCall->v0)
     {
         case 0:
         default:
@@ -30,3 +47,79 @@ u32 sub_81D1574(u8 *a)
             return 4;
     }
 }
+
+s32 sub_81D15BC(s32 rematchIdx)
+{
+    return gRematchTable[rematchIdx].trainerIds[0];
+}
+
+s32 sub_81D15CC(s32 trainerIdx)
+{
+    s32 rematchIdx;
+
+    for (rematchIdx = 0; rematchIdx < NELEMS(gRematchTable); rematchIdx++)
+    {
+        if (gRematchTable[rematchIdx].trainerIds[0] == trainerIdx)
+            return rematchIdx;
+    }
+    return -1;
+}
+
+bool32 sub_81D15F4(u32 idx)
+{
+    const match_call_t *matchCall;
+    s32 v0;
+
+    if (idx > 20)
+        return FALSE;
+    matchCall = gUnknown_086252A8[idx];
+    v0 = sub_81D1574(matchCall);
+    return gUnknown_086252FC[v0](matchCall);
+}
+
+bool32 sub_81D1628(const match_call_t *matchCall)
+{
+    if (matchCall->v2 == 0xffff)
+        return TRUE;
+    return FlagGet(matchCall->v2);
+}
+
+bool32 sub_81D164C(const match_call_t *matchCall)
+{
+    if (matchCall->v2 == 0xffff)
+        return TRUE;
+    return FlagGet(matchCall->v2);
+}
+
+bool32 sub_81D1670(const match_call_t *matchCall)
+{
+    if (matchCall->v2 == 0xffff)
+        return TRUE;
+    return FlagGet(matchCall->v2);
+}
+
+bool32 sub_81D1694(const match_call_t *matchCall)
+{
+    if (matchCall->v1 != gSaveBlock2Ptr->playerGender)
+        return FALSE;
+    if (matchCall->v2 == 0xffff)
+        return TRUE;
+    return FlagGet(matchCall->v2);
+}
+
+bool32 sub_81D16CC(const match_call_t *matchCall)
+{
+    return FlagGet(matchCall->v2);
+}
+
+bool8 sub_81D16DC(u32 idx)
+{
+    const match_call_t *matchCall;
+    s32 v0;
+
+    if (idx > 20)
+        return FALSE;
+    matchCall = gUnknown_086252A8[idx];
+    v0 = sub_81D1574(matchCall);
+    return gUnknown_08625310[v0](matchCall);
+}