Mega DianciE

Diancie @ Diancite
Ability: Clear Body
EVs: 4 HP / 252 SpA / 252 Spe
Hasty Nature
- Moonblast
- Diamond Storm
- Stealth Rock
- Protect

Toxapex @ Black Sludge
Ability: Regenerator
Shiny: Yes
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
IVs: 0 Atk
- Toxic Spikes
- Scald
- Recover
- Haze

Magnezone @ Choice Specs
Ability: Magnet Pull
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Hidden Power [Fire]
- Volt Switch
- Thunderbolt
- Flash Cannon

Greninja @ Focus Sash
Ability: Protean
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Spikes
- Ice Beam
- Scald
- Taunt

Rotom-Wash @ Leftovers
Ability: Levitate
EVs: 252 HP / 200 Def / 56 Spe
Bold Nature
IVs: 0 Atk
- Hydro Pump
- Volt Switch
- Will-O-Wisp
- Pain Split

Landorus-Therian @ Choice Scarf
Ability: Intimidate
EVs: 244 Atk / 68 Def / 196 Spe
Jolly Nature
- Earthquake
- U-turn
- Stone Edge
- Defog