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/pokemon/dex_text.asm

@@ -219,7 +219,7 @@ _GyaradosDexEntry:: ; new entry
 	dex
 
 _ShellderDexEntry:: ; new entry
-	text "Its shell is as"
+	text "Its shell is"
 	next "harder than" 
 	next "diamonds. It"
 
@@ -1256,8 +1256,8 @@ _BulbasaurDexEntry:: ; new entry
 	next "about whether"
 	
 	page "BULBASAUR is a"
-	next "plant or"
-	next "a mammal"
+	next "plant or a"
+	next "mammal"
 	dex
 
 _VenusaurDexEntry:: ; new entry

data/pokemon/new_dex_text.asm

@@ -124,8 +124,8 @@ _BittybatDexEntry::
 	next "these #MON may"
 
 	page "swarm a victim"
-	next "at once to"
-	next "prey on it"
+	next "at once to prey"
+	next "on it"
 	dex
 
 _RibbitoDexEntry::