Relabel Challenge Cup/Machine pool buffer

src/engine/bank03.asm

@@ -5249,7 +5249,7 @@ Func_ef40:
 	or a
 	jr nz, .asm_ef54
 	ld a, $31
-	ld [wRemainingIntroCards], a
+	ld [wNumRandomDuelists], a
 	ld a, LOW($51ed)
 	ld [wFilteredListPtr], a
 	ld a, HIGH($51ed)
@@ -5257,7 +5257,7 @@ Func_ef40:
 	jr .asm_ef63
 .asm_ef54
 	ld a, $25
-	ld [wRemainingIntroCards], a
+	ld [wNumRandomDuelists], a
 	ld a, LOW($524f)
 	ld [wFilteredListPtr], a
 	ld a, HIGH($524f)
@@ -5305,7 +5305,7 @@ Func_ef97:
 	ld l, a
 	ld a, [wFilteredListPtr + 1]
 	ld h, a
-	ld a, [wRemainingIntroCards]
+	ld a, [wNumRandomDuelists]
 	call Random
 	sla a
 	add_hl_a

src/engine/bank11.asm

@@ -307,7 +307,7 @@ SetChallengeCupOpponents:
 	jr nz, .gr_cup
 ; tcg cup
 	ld a, NUM_TCG_CHALLENGE_CUP_OPPONENT_POOL
-	ld [wNumChallengeCupOpponents], a
+	ld [wNumRandomDuelists], a
 	ld a, LOW(TCGChallengeCupOpponents)
 	ld [wFilteredListPtr], a
 	ld a, HIGH(TCGChallengeCupOpponents)
@@ -317,7 +317,7 @@ SetChallengeCupOpponents:
 	jr .get_cup_index
 .gr_cup
 	ld a, NUM_GR_CHALLENGE_CUP_OPPONENT_POOL
-	ld [wNumChallengeCupOpponents], a
+	ld [wNumRandomDuelists], a
 	ld a, LOW(GRChallengeCupOpponents)
 	ld [wFilteredListPtr], a
 	ld a, HIGH(GRChallengeCupOpponents)
@@ -387,7 +387,7 @@ SetChallengeCupOpponents:
 	ld l, a
 	ld a, [wFilteredListPtr + 1]
 	ld h, a
-	ld a, [wNumChallengeCupOpponents]
+	ld a, [wNumRandomDuelists]
 	call Random
 	sla a
 	sla a

src/wram.asm

@@ -2319,7 +2319,8 @@ wFilteredListPtr:: ; d575
 ; TODO: is this really union?
 UNION
 
-wNumChallengeCupOpponents:: ; d577
+; for challenge cups and challenge machines
+wNumRandomDuelists:: ; d577
 	ds $1
 
 wChallengeCupIndex:: ; d578