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/murkrow.asm

@@ -1,10 +1,10 @@
-; MurkrowPokedexEntry: ; 0x1d021e
 	db "DARKNESS@" ; species name
 	dw 108, 50 ; height, weight
 
 	db   "It hides any shiny"
 	next "object it finds in"
 	next "a secret location."
+
 	page "MURKROW and"
 	next "MEOWTH loot one"
 	next "another's stashes.@"