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/shuckle.asm

@@ -1,10 +1,10 @@
-; ShucklePokedexEntry: ; 0x1d088e
 	db "MOLD@" ; species name
 	dw 200, 450 ; height, weight
 
 	db   "The fluid secreted"
 	next "by its toes carves"
 	next "holes in rocks for"
+
 	page "nesting and can be"
 	next "mixed with BERRIES"
 	next "to make a drink.@"