Meh, I tried this, but it's no good in an actual Brawl, because it gets rid of all your damage and gives you all your stock back.
Yeah It's just like the OTFCS I didn't think anyone would want to switch costumes while actually brawling though wouldn't you want to concentrate on the match?
I actually think that I'd be able to concentrate on the match much more easily if the damage and stock wasn't affected.
Also, the Alternate File Loader is a code that makes it so that when you hold a certain button while selecting a character, it loads a texture and/or moveset from an alternate folder (not the pf folder). This basically means that if you select Marth, you'll play as Marth, but if you hold Z and select Marth, you play as Roy.