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/psyduck.asm

@@ -1,10 +1,10 @@
-; PsyduckPokedexEntry: ; 0x182cee
 	db "DUCK@" ; species name
 	dw 207, 430 ; height, weight
 
 	db   "The only time it"
 	next "can use its psy-"
 	next "chic power is when"
+
 	page "its sleeping brain"
 	next "cells happen to"
 	next "wake.@"