LOTS of things

- Replaces the Old Rod with the Candy Sack, an item to evolve Meltan into Melmetal. Meltan and Melmetal aren't in yet.
- Improves Gym Leader and Elite Four AI by a lot. They still use items, they're just better. Fixes XSpecial use while we're at it; before, it didn't actually increase the stat...
- The Scarlet Book now takes up both shelves, one section for each Paradox Pokemon. I also moved the bookshelf so it looks nicer.
- Text in Celadon University has been reduced significantly, taking up less memory and being a bit more RBY-like. It has also been made more accurate (thanks to Daiginjo for translating my booklet!)
- The Magikarp researcher in Celadon University now gives TM Dragon Rage (no longer unused!)
- Added a guard for Mt. Moon Crater.
- Removed TrainerNamePointers, Blank Leader Name Code, and Dakutens/Hakutens using a guide published by YakiNeen.
- PP no longer uses a shitty graphic and is instead properly implemented into the font, optimising the status screen. Also displays in-battle which is kinda cool.
- Lorelei, Bruno, and Agatha now play the Gym Leader theme, not just Lance.

Still unsure how to fix Celadon University's trainers, all I know is a lot of the information should be taken from the Oak fight I did. The code is radically different and doesn't call trainer headers at all. You'll likely want to start from scratch.

The Mt. Moon Crater Guard's text is a little wonky, not sure what's up there. May have been from the way I accessed Mt. Moon in testing. Anyway, if you want to mess around feel free.

audio/play_battle_music.asm

@@ -16,18 +16,31 @@ PlayBattleMusic::
 	ld a, [wCurOpponent]
 	cp OPP_ID_OFFSET
 	jr c, .wildBattle
-	cp OPP_RIVAL3
-	jr z, .finalBattle
+	cp OPP_LORELEI ; elite four now play the gym leader battle theme
+	jr z, .Elite4Battle
+	cp OPP_BRUNO
+	jr z, .Elite4Battle
+	cp OPP_AGATHA
+	jr z, .Elite4Battle
 	cp OPP_LANCE
+	jr z, .Elite4Battle
+	cp OPP_RIVAL3
+	;jr z, .finalBattle unnecessary code
+	;cp OPP_LANCE
+	;jr nz, .normalTrainerBattle
+	;ld a, MUSIC_GYM_LEADER_BATTLE
 	jr nz, .normalTrainerBattle
-	ld a, MUSIC_GYM_LEADER_BATTLE ; lance also plays gym leader theme
+	ld a, MUSIC_FINAL_BATTLE
+	jr .playSong
+	.Elite4Battle
+	ld a, MUSIC_GYM_LEADER_BATTLE
 	jr .playSong
 .normalTrainerBattle
 	ld a, MUSIC_TRAINER_BATTLE
 	jr .playSong
-.finalBattle
-	ld a, MUSIC_FINAL_BATTLE
-	jr .playSong
+;.finalBattle
+;	ld a, MUSIC_FINAL_BATTLE
+;	jr .playSong
 .wildBattle
 	ld a, MUSIC_WILD_BATTLE
 .playSong