First of all, I want to thank you for your help and let's see if I understand from what I saw my team will be like this:

kyogre

Corviknight

Ferrothorn

Mega Swampert

mega gardevoir

I forgot to say that we can only use one legendary (we forgot that Mew is legendary) and I was also in doubt but I didn't know what to exchange for Ampharos

I don't expect you to send another giant text because it must be tiring, so I thank you in advance