Option 2

Used to be special (Arceus) @ Life Orb
Ability: Multitype
Shiny: Yes
EVs: 252 Atk / 252 Spe
Adamant Nature
- Extreme Speed
- Earthquake
- Defog
- Swords Dance

The Ball on the Chain (Ferrothorn) @ Leftovers
Ability: Iron Barbs
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Power Whip
- Protect
- Toxic
- Leech Seed

Ho Ho Ho (Ho-Oh) @ Leftovers
Ability: Regenerator
Shiny: Yes
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- Sacred Fire
- Earthquake
- Toxic
- Recover

Pixceus (Arceus-Fairy) @ Pixie Plate
Ability: Multitype
Shiny: Yes
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Judgment
- Earth Power
- Recover
- Calm Mind

Shadow (Gengar-Mega) @ Gengarite
Ability: Cursed Body
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Sludge Bomb
- Shadow Ball
- Dark Pulse
- Giga Drain

New Garchomp (Zygarde-Complete) @ Groundium Z
Ability: Power Construct
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Thousand Arrows
- Extreme Speed
- Dragon Tail
- Dragon Dance