DD Mega TTar

Sylveon @ Leftovers
Ability: Pixilate
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
- Wish
- Protect
- Heal Bell
- Hyper Voice

Scizor @ Choice Band
Ability: Swarm
EVs: 248 HP / 252 Atk / 8 SpD
Adamant Nature
- U-turn
- Bullet Punch
- Knock Off
- Superpower

Thundurus @ Leftovers
Ability: Prankster
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Thunder Wave
- Volt Switch
- Hidden Power [Ice]
- Focus Blast

Tyranitar @ Tyranitarite
Ability: Sand Stream
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Dragon Dance
- Stone Edge
- Ice Punch
- Earthquake

Keldeo @ Expert Belt
Ability: Justified
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Secret Sword
- Icy Wind
- Scald
- Hydro Pump

Zapdos @ Leftovers
Ability: Pressure
EVs: 252 HP / 168 Def / 68 SpA / 20 Spe
Bold Nature
IVs: 0 Atk
- Thunderbolt
- Roost
- Defog
- Heat Wave