That's fine, if you agree to removing a Clause then it's fine, but you have to confront your partner and they have to agree, the only time you can't change your team around is when you have a rematch because of a disconnection.
Hey Halo, You've got 2 days to battle Hero in best of 3 battles, who ever wins twice will go through. Although I've stated that no Ubers will be used, if you both agree then it is fine to use them against each other. So please over the next 2 days complete your battles.
I'm just VMing you to say that I've officially started the Pokemon League, You may want to read over the rules as I have changed them since you most likely last read them.
If any problems appear than feel free to PM and I'll help you.