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/dewgong.asm

@@ -1,10 +1,10 @@
-; DewgongPokedexEntry: ; 0x1b8934
 	db "SEA LION@" ; species name
 	dw 507, 2650 ; height, weight
 
 	db   "It sleeps under"
 	next "shallow ocean"
 	next "waters during the"
+
 	page "day, then looks"
 	next "for food at night"
 	next "when it's cold.@"