Mega Metagross I

Rotom-Wash @ Leftovers
Ability: Levitate
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Volt Switch
- Hydro Pump
- Pain Split
- Will-O-Wisp

Victini @ Choice Band
Ability: Victory Star
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- V-create
- Bolt Strike
- U-turn
- Zen Headbutt

Azumarill @ Sitrus Berry
Ability: Huge Power
EVs: 76 HP / 252 Atk / 4 SpD / 176 Spe
Adamant Nature
- Belly Drum
- Play Rough
- Knock Off
- Aqua Jet

Metagross-Mega @ Metagrossite
Ability: Tough Claws
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Meteor Mash
- Ice Punch
- Zen Headbutt
- Thunder Punch

Heatran @ Leftovers
Ability: Flash Fire
EVs: 252 HP / 136 SpD / 120 Spe
Calm Nature
- Lava Plume
- Stealth Rock
- Toxic
- Earth Power

Alakazam @ Life Orb
Ability: Magic Guard
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Hidden Power [Ice]
- Psychic
- Focus Blast
- Shadow Ball