Yeah, lol, step by step, one your model could be over file size, two, u could have imported it into brawl box wrong, 3 try to add a good psa to it, idk if that helps, oh, export that , model om your desktop, and put it in the. Pcs files, that's all I can think of.
Right now im trying it over the classic sonic & tails psa.
Do that for the PCS if you hadn't already.
I tried that but still freezes. It works on very few stages and i'm trying to figure out why it won't work on all stages cause in allstar all stages work(with the .pac)