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/miltank.asm

@@ -1,10 +1,10 @@
-; MiltankPokedexEntry: ; 0x1d1482
 	db "MILK COW@" ; species name
 	dw 311, 1660 ; height, weight
 
 	db   "In order to milk a"
 	next "MILTANK, one must"
 	next "have a knack for"
+
 	page "rhythmically pull-"
 	next "ing up and down"
 	next "on its udders.@"