Gym Leader Rematches!

This commit adds a large fundamental change to KEP, that being Gym Rematches.

This is achieved alongside a rework to the script that makes those post-game-gating NPCs shift around. If you add a new one, just add its constant to the lists you'll see in the Hall of Fame script.

It also fixes a few bugs:
- Fixed a bug where Cinnabar Gym loaded a fleet of Blaines. This occurred due to the way he is coded at base, and a misunderstanding I had when implementing his scaling. This is now fixed by standardising his gym script instead, while letting the gym trainers still use the old one.
- Fixed a bug where the Up-Grade NPC would not appear after beating Silph Co. 11F. However, Giovanni currently seems to have trouble with his text. This floor needs some re-coding anyway, given we need to add Jessie and James to it.

And some misc. changes:
- Changed the first Moon Stone in Mt. Moon to a Poison Stone for the Nidoking speedrunners
- Debug Mode now has a line of code to set up the post-game easily
- Changed Surge's initial battle text to Yellow's
- Added Sabrina's more accurate LGPE initial battle text, referring to the spoon she bent by accident

text/CeruleanGym.asm

@@ -124,3 +124,30 @@ _CeruleanGymGuidePostBattleText::
 	line "we make a pretty"
 	cont "darn good team!"
 	done
+
+_MistyRematchPreBattleText::
+	text "I heard an"
+	line "interesting"
+	cont "rumor!"
+	
+	para "Not only did you"
+	line "beat those TEAM"
+	cont "ROCKET guys, but"
+	cont "you also became"
+	cont "the CHAMPION!"
+	
+	para "I can't take it"
+	line "anymore! I just"
+	cont "have to battle"
+	cont "you again!"
+	
+	para "You got that?"
+	
+	para "No refusing!"
+	
+	done
+
+_MistyRematchDefeatedText::
+	text "Hmph!"
+	line "How annoying!"
+	prompt