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/mr__mime.asm

@@ -1,10 +1,10 @@
-; MrMimePokedexEntry: ; 0x1b97ea
 	db "BARRIER@" ; species name
 	dw 403, 1200 ; height, weight
 
 	db   "It uses the"
 	next "mysterious"
 	next "power it has in"
+
 	page "its fingers to"
 	next "solidify air into"
 	next "an invisible wall.@"