Honestly not a huge fan of Genecect EX. I would like it more if there was good energy acceleration for it. It might actually be pretty good in Hydreigon. I don't really see Red Signal working without Porygon-Z, since you're using up your attachment for the turn.
Another note; I don't think this card will kill Keldeo. If it's Blastoise, they can just use Black Kyurem, and then you have to attach 3 more energies to KO another Keldeo. If it's any other deck, they can just not put down Keldeo if they know you're playing Genecect.
Another note; I don't think this card will kill Keldeo. If it's Blastoise, they can just use Black Kyurem, and then you have to attach 3 more energies to KO another Keldeo. If it's any other deck, they can just not put down Keldeo if they know you're playing Genecect.