Myriad of changes!

This is a pretty hefty commit, so let's break it down.
- Fixes Pokedex entries for Bittybat, Bulbasaur, and Shellder.
- ...presumably fixes the options menu.
- Adds a Fishing Group and water wild data to Diglett's Cave, also reduces the encounter rate. More to come.
- Modifies parties, including evolving Rival 2's starter.
- Attempts to fix the Ultra and Safari Balls by making `BallFactor` 4, which appears to be the intended number. Tests yielded positive results.
- Restores a ton of Japanese references that got removed in localisation, including some errors.

data/wild/super_rod.asm

@@ -39,6 +39,7 @@ SuperRodData:
 	dbw CELADON_UNIVERSITY_OUTSIDE, .Group11
 	dbw FARAWAY_ISLAND_INSIDE, 		.Group7
 	dbw MT_MOON_CRATER,				.Group10
+	dbw DIGLETTS_CAVE,				.Group12
 	db -1 ; end
 
 ; fishing groups
@@ -134,3 +135,10 @@ SuperRodData:
 	db 20, MAGIKARP
 	db 20, GYARADOS
 	db 20, GRIMER
+
+.Group12:
+	db 4
+	db 16, WIGLETT
+	db 18, WIGLETT
+	db 19, WIGLETT
+	db 28, WUGTRIO