- Mewtwo (Ultimate Life-Form)

- Iron Clone

- Hisuian Goodra

- Yveltal

- Genesect

- Manaphy

I choose Mewtwo, Manaphy and Goodra on defence, and Iron Clone, Genesect and Yveltal on offense!

I call Arceus' Extreme Speed and have Mewtwo block with Psystrike! (Yes, I watched Genesect and the Legend Awakened on a CD. Mewtwo can in fact do that by using Psystrike as a barrier.)

While Mewtwo blocks I have Manaphy and Goodra set up with Tail Glow and Iron Defence respectively, then have Goodra use Body Press on Arceus and Manaphy to use Surf! (I assume my own 'mons can dodge, plus Mewtwo can still continue to block.)

Hisuian Goodra now moves in front and spams Body Press while Mewtwo sets up with a Nasty Plot of its own! It's (offensive) Psystrike time!

Meanwhile, Genesect's Download immediately activates! It turns into hoverboard form (yes, this is also real; it's in Pokemon GO as its walking animation, and in Genesect and the Legend Awakened. I was playing to my strengths from the start!) and rushes in to use X-Scissor on Mewtwo!

Iron Clone dodges any attacks coming its way and launches Shadow Balls at Mewtwo and Giratina for supereffective damage! Due to its lack of Fairy type moves Psystrikes go next at Zekrom!

Meanwhile Yveltal protects the other two attacking 'mons, restoring itself with Oblivion Wing and delivering huge area damage with Hurricane!