Rate my UU team! (So far 5 wins, 0 losses, 1 draw)

Question

Pokemons (6):

Empoleon (M) @ Leftovers
Trait: Defiant
EVs: 252 HP / 248 SDef / 8 SAtk
Calm Nature
- Scald
- Ice Beam
- Roar
- Stealth Rock

Mew @ Light Clay
Trait: Synchronize
EVs: 252 HP / 128 Def / 128 SDef
Calm Nature
- Reflect
- Light Screen
- Softboiled
- U-turn

Yanmega (M) @ Choice Specs
Trait: Tinted Lens
EVs: 252 SAtk / 252 Spd / 4 Def
Timid Nature
- Air Slash
- Bug Buzz
- Giga Drain
- U-turn

Porygon2 @ Eviolite
Trait: Download
EVs: 252 SAtk / 252 Spd / 4 SDef
Modest Nature
- Tri Attack
- Ice Beam
- Thunder Wave
- Recover

Victini @ Life Orb
Trait: Victory Star
EVs: 252 Atk / 252 Spd / 4 Def
Jolly Nature
- V-create
- Bolt Strike
- U-turn
- Hidden Power [Grass]

Flygon (M) @ Choice Band
Trait: Levitate
EVs: 252 Atk / 252 Spd / 4 SDef
Jolly Nature
- Earthquake
- Outrage
- Fire Punch
- U-turn

Comments

Why HP Grass and Jolly on Vicitini?

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Grass Knot > HP Grass

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Zen Headbutt > HP Grass and Grass Knot.
And speed on Porygon2 o_O Thunderbolt > Thunder Wave and HP EVs instead of speed.

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Actually, Grass Knot > Zen Headbutt, as it provides an effective way to OHKO Rhyperior, who walls the hell out of Victini.

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Hits Swampert too. Also doesn't jolly still ko Rhyperior and Swamppy?

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Guaranteed OHKO vs Rhyp w/ Jolly, not sure about max SDef Swampy.