Hex Editing Items

Hey, quick, but specific question. Are there any editors that allow you to change the properties of items in this game? How many hands they take, who can use them, etc. or codes that let me put a specific item directly into a character's hands to override this?

I'm looking to use Edward the entire game and to offset the fact that he's not supposed to be used in the middle and therefore has no mid game weapons available I was hoping to make the harps 1-handed so he could use both at the same time, and/or make him able to use boomerangs and full moons.

If this can be done on the GBA version of it, I'd appreciate the info. I've managed to do this with the PS1 version via gameshark at one point. Well good day to all anyways.