My friend and I are going to have a Metronome battle: for items, I am only allowed Life Orb, I must have Metronome on each Pokemon. So..here we go!

Mew @ Life Orb
Trait: Synchronize
EVs: 128 Atk / 128 SAtk / 252 Spd
Naive Nature (+Spd, -SDef)
- Metronome
- Giga Drain
- Drain Punch
- Work Up

Celebi @ Life Orb
Trait: Natural Cure
EVs: 128 Atk / 128 SAtk / 252 Spd
Hasty Nature (+Spd, -Def)
- Metronome
- Psychic
- Water Pulse
- Energy Ball

Jirachi @ Life Orb
Trait: Serene Grace
EVs: 128 Atk / 128 SAtk / 252 Spd
Naive Nature (+Spd, -SDef)
- Iron Head
- Water Pulse
- Metronome
- Thunder Wave

Medicham (M) @ Life Orb
Trait: Pure Power
EVs: 4 Atk / 252 SAtk / 252 Spd
Naive Nature (+Spd, -SDef)
- Metronome
- Hi Jump Kick
- Acupressure
- Shadow Ball

Mewtwo @ Life Orb
Trait: Pressure
EVs: 128 Atk / 128 SAtk / 252 Spd
Naughty Nature (+Atk, -SDef)
- Metronome
- Psystrike
- Aura Sphere
- Ice Punch

Ambipom (M) @ Life Orb
Trait: Technician
EVs: 128 Atk / 128 SAtk / 252 Spd
Naive Nature (+Spd, -SDef)
- Metronome
- Shock Wave
- Nasty Plot
- Aerial Ace