Banette ex is mewtwo ex from paradox rift. Champions' festival is luxurious cape from paradox rift.
This deck revolves around discarding energy and using mewtwo ex's attack, which allows you to attach 2 energy from your discard pile, and using solrock's ability to attach energy to lunatone, who will be one of the main attackers in this deck. Use luxurious capes on lunatone to give it +100 hp to last on hit ko's.
Please recommend changes in the comments!