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/croconaw.asm

@@ -1,10 +1,10 @@
-; CroconawPokedexEntry: ; 0x1ccc84
 	db "BIG JAW@" ; species name
 	dw 307, 550 ; height, weight
 
 	db   "The tips of its"
 	next "fangs are slanted"
 	next "backward. Once"
+
 	page "those fangs clamp"
 	next "down, the prey has"
 	next "no hope of escape.@"