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/rattata.asm

@@ -1,10 +1,10 @@
-; RattataPokedexEntry: ; 0x181e3d
 	db "RAT@" ; species name
 	dw 100, 80 ; height, weight
 
 	db   "This #MON's"
 	next "impressive vital-"
 	next "ity allows it to"
+
 	page "live anywhere. It"
 	next "also multiplies"
 	next "very quickly.@"