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/nidoran_m.asm

@@ -1,10 +1,10 @@
-; NidoranMPokedexEntry: ; 0x182392
 	db "POISON PIN@" ; species name
 	dw 108, 200 ; height, weight
 
 	db   "It constantly"
 	next "moves its large"
 	next "ears in many"
+
 	page "directions in"
 	next "order to detect"
 	next "danger right away.@"