How good is this team for competitive(X/Y)

Question

To the extreme (Arceus) @ Life Orb
Ability: Multitype
Level: 94
Happiness: 1
EVs: 248 HP / 248 Atk / 12 SpD
Adamant Nature
- Swords Dance
- Extreme Speed
- Shadow Claw
- Recover

Baby Shark (Garchomp) @ Focus Sash
Ability: Rough Skin
Level: 70
EVs: 248 Atk / 8 SpD / 252 Spe
Timid Nature
- Swords Dance
- Earthquake
- Dragon Claw
- Iron Head

Apollo (Volcarona) @ Focus Sash
Ability: Flame Body
Level: 70
Happiness: 1
EVs: 12 Def / 248 SpA / 248 Spe
Lax Nature
IVs: 0 Atk
- Quiver Dance
- Flamethrower
- Bug Buzz
- Psychic

Mega-boi (Gyarados) (M) @ Gyaradosite
Ability: Intimidate
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Dragon Dance
- Waterfall
- Crunch

Champion! (Mewtwo) @ Focus Sash
Ability: Unnerve
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Flamethrower
- Ice Beam
- Shadow Ball
- Aura Sphere

Remember this set is my current set in X and Y. Please don’t suggest Z-moves.
Also all Pokémon have 31x6 Ivs and are all Legal.

Comments

This will probably help more than a team rate. https://docs.google.com/document/d/1qYztMbBTY0qm4mFy1-66bafgsVQ2gkeErAO3QUghEBY/edit?usp=sharing

Answer 1

The Mewtwo needs a mega stone (I recommend Y to better suit your moveset). It also needs a psychic-type move.

Instead of Flamethrower on Volcarona, you could try Fiery Dance, since it has a 50% chance to raise your special attack.

Gyarados can do just fine without mega evolution, just use ice fang instead of crunch, along with moxie ability, and he's good to go.

Comments

To add to Shinsei's improvements, Volcarona, in my opinion, should not have Psychic but instead Giga Drain. In X-Y, Greninja is VERY popular as a hazard setter and as Ash-Greninja in USUM. To annihilate it, Giga Drain takes full advantage of non-expecting Greninjas. At one point in time, I was thinking of replacing something with HP Ice to deal with Lando-T & Greninja Cores.