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/umbreon.asm

@@ -1,10 +1,10 @@
-; UmbreonPokedexEntry: ; 0x1d01af
 	db "MOONLIGHT@" ; species name
 	dw 303, 600 ; height, weight
 
 	db   "On the night of a"
 	next "full moon, or when"
 	next "it gets excited,"
+
 	page "the ring patterns"
 	next "on its body glow"
 	next "yellow.@"