Thank you for the quick help. I've checked each character now, and 3 (Captain Falcon, Pit, Ike) are consistently causing the freeze upon selection. Now that I know which ones are causing issues, is there a way to fix this without remaking the PSA entirely? I've only changed basic variables without adding any effects or textures, so I am not sure why there is a file size issue now. All 3 are far from the limit according to this thread.
http://forums.kc-mm.com/index.php?topic=5876.0