diff --git a/include/battle_main.h b/include/battle_main.h
index e04db17bb0..217b10b391 100644
--- a/include/battle_main.h
+++ b/include/battle_main.h
@@ -57,15 +57,15 @@ u32 sub_80397C4(u32 setId, u32 tableId);
 void SpriteCb_WildMon(struct Sprite *sprite);
 void SpriteCallbackDummy_2(struct Sprite *sprite);
 void SpriteCB_FaintOpponentMon(struct Sprite *sprite);
-void sub_8039AD8(struct Sprite *sprite);
-void sub_8039B2C(struct Sprite *sprite);
-void sub_8039B58(struct Sprite *sprite);
+void SpriteCb_ShowAsMoveTarget(struct Sprite *sprite);
+void SpriteCb_HideAsMoveTarget(struct Sprite *sprite);
+void SpriteCb_OpponentMonFromBall(struct Sprite *sprite);
 void sub_8039BB4(struct Sprite *sprite);
 void sub_80105DC(struct Sprite *sprite);
 void sub_8039C00(struct Sprite *sprite);
 void DoBounceEffect(u8 battlerId, u8 b, s8 c, s8 d);
 void EndBounceEffect(u8 battlerId, bool8 b);
-void sub_8039E44(struct Sprite *sprite);
+void SpriteCb_PlayerMonFromBall(struct Sprite *sprite);
 void sub_8039E60(struct Sprite *sprite);
 void sub_8039E84(struct Sprite *sprite);
 void sub_8039E9C(struct Sprite *sprite);
diff --git a/src/battle_controller_player.c b/src/battle_controller_player.c
index 6dd9cd2f48..a1fec0fe1c 100644
--- a/src/battle_controller_player.c
+++ b/src/battle_controller_player.c
@@ -359,7 +359,7 @@ static void HandleInputChooseTarget(void)
         } while (i < gBattlersCount);
     }
 
-    if (gMain.heldKeys & DPAD_ANY && gSaveBlock2Ptr->optionsButtonMode == 2)
+    if (gMain.heldKeys & DPAD_ANY && gSaveBlock2Ptr->optionsButtonMode == OPTIONS_BUTTON_MODE_L_EQUALS_A)
         gPlayerDpadHoldFrames++;
     else
         gPlayerDpadHoldFrames = 0;
@@ -367,7 +367,7 @@ static void HandleInputChooseTarget(void)
     if (gMain.newKeys & A_BUTTON)
     {
         PlaySE(SE_SELECT);
-        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = sub_8039B2C;
+        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = SpriteCb_HideAsMoveTarget;
         BtlController_EmitTwoReturnValues(1, 10, gMoveSelectionCursor[gActiveBattler] | (gMultiUsePlayerCursor << 8));
         EndBounceEffect(gMultiUsePlayerCursor, BOUNCE_HEALTHBOX);
         PlayerBufferExecCompleted();
@@ -375,7 +375,7 @@ static void HandleInputChooseTarget(void)
     else if (gMain.newKeys & B_BUTTON || gPlayerDpadHoldFrames > 59)
     {
         PlaySE(SE_SELECT);
-        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = sub_8039B2C;
+        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = SpriteCb_HideAsMoveTarget;
         gBattlerControllerFuncs[gActiveBattler] = HandleInputChooseMove;
         DoBounceEffect(gActiveBattler, BOUNCE_HEALTHBOX, 7, 1);
         DoBounceEffect(gActiveBattler, BOUNCE_MON, 7, 1);
@@ -384,7 +384,7 @@ static void HandleInputChooseTarget(void)
     else if (gMain.newKeys & (DPAD_LEFT | DPAD_UP))
     {
         PlaySE(SE_SELECT);
-        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = sub_8039B2C;
+        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = SpriteCb_HideAsMoveTarget;
 
         do
         {
@@ -421,12 +421,12 @@ static void HandleInputChooseTarget(void)
             if (gAbsentBattlerFlags & gBitTable[gMultiUsePlayerCursor])
                 i = 0;
         } while (i == 0);
-        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = sub_8039AD8;
+        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = SpriteCb_ShowAsMoveTarget;
     }
     else if (gMain.newKeys & (DPAD_RIGHT | DPAD_DOWN))
     {
         PlaySE(SE_SELECT);
-        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = sub_8039B2C;
+        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = SpriteCb_HideAsMoveTarget;
 
         do
         {
@@ -463,7 +463,7 @@ static void HandleInputChooseTarget(void)
             if (gAbsentBattlerFlags & gBitTable[gMultiUsePlayerCursor])
                 i = 0;
         } while (i == 0);
-        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = sub_8039AD8;
+        gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = SpriteCb_ShowAsMoveTarget;
     }
 }
 
@@ -536,7 +536,7 @@ static void HandleInputChooseMove(void)
             else
                 gMultiUsePlayerCursor = GetBattlerAtPosition(B_POSITION_OPPONENT_LEFT);
 
-            gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = sub_8039AD8;
+            gSprites[gBattlerSpriteIds[gMultiUsePlayerCursor]].callback = SpriteCb_ShowAsMoveTarget;
         }
     }
     else if (gMain.newKeys & B_BUTTON || gPlayerDpadHoldFrames > 59)
diff --git a/src/battle_main.c b/src/battle_main.c
index dd31e12d54..7b91ffbd32 100644
--- a/src/battle_main.c
+++ b/src/battle_main.c
@@ -96,7 +96,7 @@ static void SpriteCb_WildMonShowHealthbox(struct Sprite *sprite);
 static void SpriteCb_WildMonAnimate(struct Sprite *sprite);
 static void sub_80398D0(struct Sprite *sprite);
 static void SpriteCB_AnimFaintOpponent(struct Sprite *sprite);
-static void sub_8039AF4(struct Sprite *sprite);
+static void SpriteCb_BlinkVisible(struct Sprite *sprite);
 static void SpriteCallbackDummy_3(struct Sprite *sprite);
 static void oac_poke_ally_(struct Sprite *sprite);
 static void SpecialStatusesClear(void);
@@ -2798,31 +2798,31 @@ static void SpriteCB_AnimFaintOpponent(struct Sprite *sprite)
     }
 }
 
-void sub_8039AD8(struct Sprite *sprite)
+// Used when selecting a move, which can hit multiple targets, in double battles.
+void SpriteCb_ShowAsMoveTarget(struct Sprite *sprite)
 {
     sprite->data[3] = 8;
     sprite->data[4] = sprite->invisible;
-    sprite->callback = sub_8039AF4;
+    sprite->callback = SpriteCb_BlinkVisible;
 }
 
-static void sub_8039AF4(struct Sprite *sprite)
+static void SpriteCb_BlinkVisible(struct Sprite *sprite)
 {
-    sprite->data[3]--;
-    if (sprite->data[3] == 0)
+    if (--sprite->data[3] == 0)
     {
         sprite->invisible ^= 1;
         sprite->data[3] = 8;
     }
 }
 
-void sub_8039B2C(struct Sprite *sprite)
+void SpriteCb_HideAsMoveTarget(struct Sprite *sprite)
 {
     sprite->invisible = sprite->data[4];
     sprite->data[4] = FALSE;
     sprite->callback = SpriteCallbackDummy_2;
 }
 
-void sub_8039B58(struct Sprite *sprite)
+void SpriteCb_OpponentMonFromBall(struct Sprite *sprite)
 {
     if (sprite->affineAnimEnded)
     {
@@ -2965,7 +2965,7 @@ static void SpriteCB_BounceEffect(struct Sprite *sprite)
 #undef sBouncerSpriteId
 #undef sWhich
 
-void sub_8039E44(struct Sprite *sprite)
+void SpriteCb_PlayerMonFromBall(struct Sprite *sprite)
 {
     if (sprite->affineAnimEnded)
         BattleAnimateBackSprite(sprite, sprite->sSpeciesId);
diff --git a/src/main.c b/src/main.c
index 5249d11fa4..454fefc5cf 100644
--- a/src/main.c
+++ b/src/main.c
@@ -280,7 +280,7 @@ static void ReadKeys(void)
     gMain.heldKeys = gMain.heldKeysRaw;
 
     // Remap L to A if the L=A option is enabled.
-    if (gSaveBlock2Ptr->optionsButtonMode == 2)
+    if (gSaveBlock2Ptr->optionsButtonMode == OPTIONS_BUTTON_MODE_L_EQUALS_A)
     {
         if (gMain.newKeys & L_BUTTON)
             gMain.newKeys |= A_BUTTON;
diff --git a/src/pokeball.c b/src/pokeball.c
index d473f9ba06..1a0561c33a 100644
--- a/src/pokeball.c
+++ b/src/pokeball.c
@@ -798,9 +798,9 @@ static void SpriteCB_ReleaseMonFromBall(struct Sprite *sprite)
     StartSpriteAffineAnim(&gSprites[gBattlerSpriteIds[sprite->sBattler]], 1);
 
     if (GetBattlerSide(sprite->sBattler) == B_SIDE_OPPONENT)
-        gSprites[gBattlerSpriteIds[sprite->sBattler]].callback = sub_8039B58;
+        gSprites[gBattlerSpriteIds[sprite->sBattler]].callback = SpriteCb_OpponentMonFromBall;
     else
-        gSprites[gBattlerSpriteIds[sprite->sBattler]].callback = sub_8039E44;
+        gSprites[gBattlerSpriteIds[sprite->sBattler]].callback = SpriteCb_PlayerMonFromBall;
 
     AnimateSprite(&gSprites[gBattlerSpriteIds[sprite->sBattler]]);
     gSprites[gBattlerSpriteIds[sprite->sBattler]].data[1] = 0x1000;