Cerberus87
Mega Houndoom, baby!
- 1,639
- Posts
- 12
- Years
- Dream World
- Seen Dec 21, 2016
I have just answered it before but I will say it again. You need national dex before you can get pokemon other than the original 151 so Onix is not evolving because Steelix is from Gen 2.
I have the National Dex.
When you don't have the National Dex and you try to evolve a Pokémon into a Johto one, it actually goes into the evolution screen but it blocks the evolution and displays a silent message. In my case, you can't actually use the item to make the Pokémon evolve.
@karatekid552: Jambo51's explanation was fine, but unfortunately I don't know the location of the table in the ROM to update it with other item data, so I'm a bit stuck... Probably needs ASM as well, which I'm not versed in.