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/rapidash.asm

@@ -1,10 +1,10 @@
-; RapidashPokedexEntry: ; 0x1b855e
 	db "FIRE HORSE@" ; species name
 	dw 507, 2090 ; height, weight
 
 	db   "It just loves to"
 	next "gallop. The faster"
 	next "it goes, the long-"
+
 	page "er the swaying"
 	next "flames of its mane"
 	next "will become.@"