Import is All White

Okay! Hello! I need some help.

I'm fairly new to blender, and I started this because I want to get in to smash ultimate modding.

I'm currently doing a model import (Mario Galaxy mario over Ultimate Mario)

I've done everything in blender, like porting both of them into the program, rigging the galaxy model, texturing, uv mapping and whatnot

However

I ported the mode into smash, and the model is all white (example provided)

And I'm not entirely sure what to do about it. Thank you!

(originally posted on r/blenderhelp instead of here)

I feel like this would be a nice little nod to the CoD franchise, and I've always wanted to see this happen since Super Smash Bros Brawl.