So a sort of follow up to what I mentioned a while ago about trying to port to PAL.
All stages are working, all alternate costumes are working, all characters are working besides Kirby, Mewtwo, Squirtle, Ivysaur, Charizard, Roy and maybe other characters I haven't quite tested who all crash the game upon being selected, although all sound effects are gone except for common sounds (menu and fighter common) and Mario's sound effects because smashbros_sound.brsar has completely addresses for almost everything, and sometimes a fighter will get stuck in T-pose for no reason until they get hurt. And sometimes the game gets stuck in endless loading when trying to load any of the new costumes (Dr. Mario, OoT Link, Classic Fox etc) but when I test again it loads fine.
Essentially, it's nearly perfect, besides being very unstable and the character select screen lacking Roy (I have separated all the transforming characters but the random icon uses the sprite for Mario's icon because code's fault) and the stage select layout being the same as Brawl for the time being because there's no working code that alters the number of stages on each page. Though I might stop and wait for 3.5 to release at this point.