I have added a few clones (Dr. Mario, Pichu, Roy, Mewtwo and Shadow) and i was going to add another Marth clone, Lucina. However, starting a match with her selected only loads infinitely at the SSS, yet Roy works perfectly fine, if it matters, Lucina and Shadow come from Legacy XP but Shadow does work (but he crashes at the results screen), Dr. Mario and Pichu are from Smash 2 and they both have a couple problems but they work good too.