Move battle engine data into data/

IsJohtoGymLeader → IsGymLeader

data/trainers/leaders.asm

@@ -0,0 +1,32 @@
+; These lists determine the battle music and victory music, and whether to
+; award HAPPINESS_GYMBATTLE for winning.
+
+; Note: CHAMPION and RED are unused for battle music checks, since they are
+; accounted for prior to the list check.
+
+GymLeaders:
+	db FALKNER
+	db WHITNEY
+	db BUGSY
+	db MORTY
+	db PRYCE
+	db JASMINE
+	db CHUCK
+	db CLAIR
+	db WILL
+	db BRUNO
+	db KAREN
+	db KOGA
+	db CHAMPION
+	db RED
+; fallthrough
+KantoGymLeaders:
+	db BROCK
+	db MISTY
+	db LT_SURGE
+	db ERIKA
+	db JANINE
+	db SABRINA
+	db BLAINE
+	db BLUE
+	db -1