Thats weird... Maybe it has something to do with your region. I have the PAL version of brawl and I had a "faulty" PAL texture hack code where the game would randomly freeze, I don't know if I tested the smaaash textures while I still had that faulty code or not.
How does Pit arrow textures work? Every time I download arrow texture, I get 2 files. 1 called FitPit.pac and another called FitPitMotionEtc.pac. As far as I know, you're meant to put these 2 files into Pit's folder without renaming them. I did that, the arrow texture is fine, but then he doesn't have any sword slash effects and none of his attacks make noise. Please help!