I have the BSP's set to the correct size, named correctly, and with no background. However, whenever I try to load some that I've made myself, the game will freeze when I start a match and it tries to load it. I've gotten other BSP's to work that already came as a BRRES, but when I make my own BRRES and all that jazz, I keep freezing when they try to load.
it's because the file is too big what you need to do is make sure you compress the file size that way it doesn't go over the original file size. i had the same problem a few days ago.
The pictures have to be 128x160 in size. That is the size of Brawl's portraits.