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/skiploom.asm

@@ -1,10 +1,10 @@
-; SkiploomPokedexEntry: ; 0x1cd928
 	db "COTTONWEED@" ; species name
 	dw 200, 20 ; height, weight
 
 	db   "As soon as it"
 	next "rains, it closes"
 	next "its flower and"
+
 	page "hides in the shade"
 	next "of a tree to avoid"
 	next "getting wet.@"