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/voltorb.asm

@@ -1,10 +1,10 @@
-; VoltorbPokedexEntry: ; 0x1b8eb0
 	db "BALL@" ; species name
 	dw 108, 230 ; height, weight
 
 	db   "During the study"
 	next "of this #MON,"
 	next "it was discovered"
+
 	page "that its compo-"
 	next "nents are not"
 	next "found in nature.@"