First of all you will need this program called
BrawlBoxNext you will need some kind of picture editing software that will let you edit png's.
Third you will need to go
here to find the original textures of the characters. It matches up with the path on your sd card.
After that open up the texture in Brawlbox and export by right clicking the specific part of the texture you want then edit it then right click that part again and replace it. When you're done save it as a .pac and .pcs and you are done. =]
Oh and your avi...
