Serapis

Gengar-Mega @ Gengarite
Ability: Levitate
Level: 50
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Shadow Ball
- Sludge Bomb
- Disable
- Protect

Whimsicott @ Mental Herb
Ability: Prankster
Level: 50
EVs: 252 HP / 196 Def / 60 SpD
Bold Nature
- Fake Tears
- Encore
- Tailwind
- Protect

Xerneas @ Power Herb
Ability: Fairy Aura
Level: 50
EVs: 172 HP / 28 Def / 252 SpA / 4 SpD / 52 Spe
Modest Nature
IVs: 0 Atk
- Moonblast
- Dazzling Gleam
- Geomancy
- Protect

Groudon (Groudon-Primal) @ Red Orb
Ability: Drought
Level: 50
EVs: 28 HP / 4 Def / 220 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Flamethrower
- Earth Power
- Eruption
- Protect

Kangaskhan-Mega (F) @ Kangaskhanite
Ability: Inner Focus
Level: 50
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Fake Out
- Double-Edge
- Low Kick
- Sucker Punch

Amoonguss @ Sitrus Berry
Ability: Regenerator
Level: 50
EVs: 188 HP / 172 Def / 148 SpD
Sassy Nature
IVs: 0 Spe
- Grass Knot
- Spore
- Rage Powder
- Protect