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/nidorino.asm

@@ -1,10 +1,10 @@
-; NidorinoPokedexEntry: ; 0x1823fd
 	db "POISON PIN@" ; species name
 	dw 211, 430 ; height, weight
 
 	db   "It is easily"
 	next "agitated and uses"
 	next "its horn for"
+
 	page "offense as soon as"
 	next "it notices an"
 	next "attacker.@"