BattleBox

Shuckle (M) @ Leftovers
Ability: Contrary
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
IVs: 30 Def / 30 SpA
- Toxic
- Infestation
- Shell Smash
- Sticky Web

Darkrai
Ability: Bad Dreams
Level: 50
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Dark Void
- Dream Eater
- Dark Pulse
- Phantom Force

Mewtwo-Mega-X @ Mewtwonite X
Ability: Pressure
EVs: 252 Atk / 2 Def / 4 SpD / 252 Spe
Jolly Nature
- Drain Punch
- Bulk Up
- Ice Punch
- Amnesia

Klefki (F) @ Light Clay
Ability: Prankster
Level: 54
EVs: 252 HP / 252 Def / 6 SpD
Bold Nature
IVs: 26 Atk
- Spikes
- Light Screen
- Reflect
- Foul Play

Giratina-Origin @ Griseous Orb
Ability: Levitate
EVs: 240 HP / 252 Atk / 16 SpD / 2 Spe
Adamant Nature
- Shadow Sneak
- Pain Split
- Will-O-Wisp
- Dragon Tail

Charizard-Mega-X @ Charizardite X
Ability: Blaze
Level: 50
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Dragon Dance
- Dragon Claw
- Flare Blitz
- Roost