My team was not optimized but here it is
Mega Eevee: gentle nature
Item: Eevite
Ability:Protean Maxima
Moves:
Thunderbolt
Ice Beam
Moonblast
Foul Play
Delta Scyther: Careful Nature
Item: Focus Sash
Ability: Hustle
Moves:
Icicle Crash
Close Combat
Night Slash
Hone Claws
Gyarados: Gentle Nature
Ability: Moxie
Item: Mystic Water
Moves:
Custom Move, Grass (Name, Leaf Fang)
Dragon Dance
Aqua Tail
Taunt
Delta Ambipom: Bold Nature
Item: Life Orb
Ability: Technician
Moves:
Fake Out
Achilles Heel
Shadow Claw
Destiny Bond (Unused)
Aegislash: Brave Nature
Item: Leftovers
Ability: Stance Change
Moves:
Shadow Sneak
Swords Dance
Sacred Sword
King’s Shield
Excadrill: Jolly Nature
Item: Leftovers (Elite Four), Choice Scarf (Champion)
Ability: Mold Breaker
Moves:
Earthquake
Rock Slide
Iron Head
Swords Dance