Modding for Dolphin (Wii Emulator)

Does anyone know if this is possible to do? Would love to get some updated rosters/faces and draft classes if possible.

I don't think any of the available tools are compatible with the Wii version's files. Being a mostly PC modding community, I'm guessing not a lot of people around these parts have looked into it. However, there's been some success modding 360 and PS3 games through emulators, so it may indeed be possible if there are any compatible tools. I'm guessing if nothing else, you could do as much as is possible in-game, and distribute the save files. It wouldn't be as detailed as mods with custom art files and where the roster file can be externally edited to access attributes that are normally hidden in-game, but it'd be a start.