ataki- 4atk diancie + lati + cross

Diancie-Mega @ Diancite
Ability: Magic Bounce
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Diamond Storm
- Moonblast
- Hidden Power [Fire]
- Psychic

Latias @ Dragonium Z
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Calm Mind
- Draco Meteor
- Psychic
- Hidden Power [Fire]

Heracross @ Flame Orb
Ability: Guts
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Megahorn
- Close Combat
- Knock Off
- Facade

Rotom-Heat @ Leftovers
Ability: Levitate
EVs: 248 HP / 8 Def / 252 Spe
Timid Nature
IVs: 0 Atk
- Will-O-Wisp
- Overheat
- Volt Switch
- Pain Split

Crobat @ Sky Plate
Ability: Infiltrator
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Brave Bird
- U-turn
- Defog
- Roost

Mamoswine @ Life Orb
Ability: Thick Fat
EVs: 252 Atk / 252 Spe
Naive Nature
- Stealth Rock
- Earthquake
- Freeze-Dry
- Ice Shard