- Your team lacks much of physical attackers.
- Choice Specs Groudon is ****.
Arceus-Electric would be running Calm Mind somewhere better than all-out attacker. I believe Flamethrower is not necessary. Other than that, fine.
Xerneas and the rest of your team are walled by Ho-Oh, so you might pack the unexpected Rock Slide under the hood and run 40 HP / 180 SAtk / 32 Atk / 212 Speed of EVs. Drop Thunderbolt for Rock Slide.
Kyurem-White without Draco Meteor is like Lebanon without cedars: dead. So drop useless Psychic and Draco Meteor instead.
Giratina with both Shadow Force and Shadow Claw seems very redundant. Outrage is **** this gen as well with Xerneas and Arceus-Fairy roaming in the tier. I've never played Giratina well but I believe this is better:
Giratina-O @ Griseous Orb:
Trait: Levitate
EVs: 252 HP / 252 Atk / 4 SDef
Adamant Nature
- Dragon Claw
- Dragon Tail
- Shadow Claw
- Rest
Dragon Tail is here in case you need phazing an Arceus or something. You will be using Dragon Claw more, instead.
Groudon with Fire Blast and Solar Beam means you don't know how playing this godzilla.
Groudon @ Leftovers:
Trait: Drought
EVs: 252 HP / 252 Atk / 4 SDef
Adamant Nature
- Thunder Wave
- Earthquake
- Stone Edge
- Swords Dance / Bulk Up
Paralyze a foe, setup then hit. EdgeQuake is nice on its own, although you can consider Fire Punch as well.
Mewtwo is fine, although Fire Blast is of consideration.
I hope this helped!
~ Sincerely yours, RecreativeReshiram.