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/ditto.asm

@@ -1,10 +1,10 @@
-; DittoPokedexEntry: ; 0x1cc13c
 	db "TRANSFORM@" ; species name
 	dw 100, 90 ; height, weight
 
 	db   "When it encount-"
 	next "ers another DITTO,"
 	next "it will move"
+
 	page "faster than normal"
 	next "to duplicate that"
 	next "opponent exactly.@"