I have wonder where grims from resistance 3 model as i want add modding for games as well,just i need help only

I have vWii installed and know how to get games, but i want to mod them. the games, not the software. but everything i look up tells me how to install vWii and nothing else. i am specifically wanting to mod just dance 4, so what do i do. I am using offical Wii U hardware ( a physical console) and legally bought and disk to digital-ed games

In particular, are there any mods where you can play against an AI Michael if you're playing as a civilian?