Rate my newest OU team!

Question

Celebi @ Leftovers
Ability: Natural Cure
EVs: 220 HP / 252 SpA / 36 Spe
Mild Nature
- Calm Mind
- U-turn
- Giga Drain
- Psychic

Kyurem-Black @ Choice Scarf
Ability: Teravolt
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Fusion Bolt
- Dragon Tail
- Stone Edge
- Iron Head

Heatran @ Air Balloon
Ability: Flash Fire
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
- Earth Power
- Stealth Rock
- Flamethrower
- Roar

Skarmory @ Leftovers
Ability: Sturdy
EVs: 252 HP / 232 Def / 24 Spe
Impish Nature
- Brave Bird
- Spikes
- Whirlwind
- Roost

Keldeo @ Choice Specs
Ability: Justified
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Secret Sword
- Scald
- Hidden Power [Electric]
- Icy Wind

Sylveon @ Pixie Plate
Ability: Pixilate
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
- Hyper Voice
- Calm Mind
- Heal Bell
- Draining Kiss

Would be thankful for any tips of advice!!

Answer 1

I enjoy this team a lot and its pretty good. Although, I really think you should give Heatran Flash Cannon instead of Stealth Rocks; And give Skarmory Stealth Rocks and get rid of Spikes. If your playing ORAS then teach Skarmory Stealth Rocks through move tutor because nothing is immune to it, and Stealth Rocks causes more damage on things that are weak to rock. (I'm Looking at you Charizard). Also, you have an offensive Heatran, not defensive, so flash cannon lets you hit Fairy types and Rock types etc. Plus its Stab. And finally, I think you should get rid of Heal Bell on Sylveon. You have a bulky set up sweeper, not a wall. For toxics, Heatran is immune to poison. For thunder waves, your Skarmory really doesn't mind since its not really an attacker and will usually go last. And for burns, you have a flash fire Heatran . I suggest another coverage move. Maybe psychic or psyshock for Gengar. Gengar can't take you out in one it and especially not if you have calm minds up, while you can do serious damage to it. Or another coverage move. Play around with it. Other than that, nice job on this team! Good luck,