i voted NO, cuz if u die u change PKMN, what means that if u want to play with ivy for example, u cant switch back, so the no-changing would only be a bother
You could use the independent Pokemon and ZSS code, the PT Pokemon won't switch when they die if that is active. It also lets you choose the regular PT if you wanted to. The only downside I've found so far is that when the Pokemon break a Smash Ball, it just breaks, they don't get to use their Final Smash.