I'd have to rework the save system, or go through all of what he did to revert it to the original save system. Cheats, I'm more likely to manage in a short timeframe. Maybe. Everything is done via scripts, so I have to dig through and find all of the commands. I'm testing some basics.
Edit: Well, the most basic way to add working cheats is to modify the shop to sell whatever is needed, and just give money hack points. Can also make your starter begin at whatever level you want, though your rival will still start at 5.