What is this, like, your fourth mod? Dude, I'm sorry for asically saying what's already been said but please, for god's sake, improve your quality! Take the advice given to you, go to Models Resource and look for decent quality modesl instead of these goddamn Commadore 64 messes of polygons. I know jack shit about rigging and uvs and normals, yet I know you need to improve them BADLY.
I'll just say these two things that you probably will ignore once you actually make the mod. First, why are you using MKDS model? Isn't there a better model available? A trophy in Smash already? Mario Kart 8 model? No reason to use such a low poly model if there's other available. Secondly, model is not T-posed. I'm guessing this is just gonna be the exact same thing as your Kamek mod, which was just left static. Please do not just import a static model, this will result in the skin being trashed for having low effort.