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/maps/DiglettsCave.asm

@@ -1,5 +1,5 @@
 DiglettsCaveWildMons:
-	def_grass_wildmons 20 ; encounter rate
+	def_grass_wildmons 15 ; encounter rate, lowered a tad to match other routes - PvK
 	db 18, DIGLETT
 	db 19, DIGLETT
 	db 17, ONIX
@@ -12,5 +12,15 @@ DiglettsCaveWildMons:
 	db 31, DUGTRIO
 	end_grass_wildmons
 
-	def_water_wildmons 0 ; encounter rate
+	def_water_wildmons 5 ; encounter rate
+	db 18, WIGLETT
+	db 19, WIGLETT
+	db 17, WIGLETT
+	db 20, WIGLETT
+	db 16, WIGLETT
+	db 15, WIGLETT
+	db 21, WIGLETT
+	db 22, WIGLETT
+	db 29, WUGTRIO
+	db 31, WUGTRIO
 	end_water_wildmons

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