Clean up comments

Base data: types uniquely lacked a comment; items on one line; distinguish unknowns
Dex entries: don't imply that pointers don't exist

data/pokemon/dex_entries/krabby.asm

@@ -1,10 +1,10 @@
-; KrabbyPokedexEntry: ; 0x1b8ddd
 	db "RIVER CRAB@" ; species name
 	dw 104, 140 ; height, weight
 
 	db   "If it is unable"
 	next "to find food, it"
 	next "will absorb"
+
 	page "nutrients by"
 	next "swallowing a"
 	next "mouthful of sand.@"