mega diancie offense

Manaphy @ Leftovers
Ability: Hydration
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Tail Glow
- Scald
- Energy Ball
- Ice Beam

Garchomp @ Rocky Helmet
Ability: Rough Skin
EVs: 252 HP / 164 Def / 92 Spe
Impish Nature
- Stealth Rock
- Earthquake
- Dragon Tail
- Fire Blast

Thundurus @ Life Orb
Ability: Prankster
EVs: 252 SpA / 4 SpD / 252 Spe
Hasty Nature
- Knock Off
- Thunder Wave
- Thunderbolt
- Hidden Power [Ice]

Jirachi @ Choice Scarf
Ability: Serene Grace
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Iron Head
- U-turn
- Heart Stamp
- Healing Wish

Latios @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk / 30 SpA / 30 Spe
- Draco Meteor
- Surf
- Hidden Power [Fire]
- Roost / Psychic

Diancie @ Diancite
Ability: Clear Body
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
IVs: 30 SpA / 30 Spe
- Protect
- Diamond Storm
- Moonblast
- Hidden Power [Fire] / Earth Power