umiman

It should still evolve through trade, if you have a friend or a second 3DS. Also since you're using a Gateway, you can install SaveDataFiler and extract your game save then just change the species in PKHeX... I'm more concerned with why it isn't evolving in the first place.

Edit: Machamp doesn't evolve either. I think I'm going to stop playing this until I can figure out what's going on.

Hmm, it's scripted in the game files to evolve when leveled up holding a metal coat while being male or female (those and time-sensitive options are the only way to make something evolve holding an item)... Did you maybe forget to uninstall game updates? Are you playing Ruby or Sapphire?

Thanks for the great romhack.

I have a question though. I'm trying to evolve Onix to Steelix but holding the metal coat while levelling doesn't seem to do anything. Is there some other requirement other than what's listed on the front page?