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/swinub.asm

@@ -1,10 +1,10 @@
-; SwinubPokedexEntry: ; 0x1d0b8d
 	db "PIG@" ; species name
 	dw 104, 140 ; height, weight
 
 	db   "It uses the tip of"
 	next "its nose to dig"
 	next "for food. Its nose"
+
 	page "is so tough that"
 	next "even frozen ground"
 	next "poses no problem.@"