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/porygon2.asm

@@ -1,10 +1,10 @@
-; Porygon2PokedexEntry: ; 0x1d110c
 	db "VIRTUAL@" ; species name
 	dw 200, 720 ; height, weight
 
 	db   "This manmade"
 	next "#MON evolved"
 	next "from the latest"
+
 	page "technology. It"
 	next "may have unprog-"
 	next "rammed reactions.@"