Literal Cancer

Baaaaah (Arceus) @ Spooky Plate
Ability: Multitype
EVs: 248 HP / 8 Def / 252 Spe
Timid Nature
- Slack Off
- Infestation
- Ingrain
- Baton Pass

Beeeeep (Registeel) @ Leftovers
Ability: Prankster
EVs: 248 HP / 8 Def / 252 SpD
Calm Nature
- Substitute
- Minimize
- Recover
- Baton Pass

Rooooor (Giratina) @ Safety Goggles
Ability: Magic Guard
EVs: 248 HP / 252 Def / 8 SpD
Bold Nature
- Milk Drink
- Quiver Dance
- Baton Pass
- Substitute

Deeeeer (Xerneas) @ Leftovers
Ability: Soundproof
Shiny: Yes
EVs: 248 HP / 8 Def / 252 SpD
Calm Nature
- Moonblast
- Baton Pass
- Heal Order
- Substitute

Baaaaah (Arceus) @ Rocky Helmet
Ability: Magic Bounce
EVs: 248 HP / 8 SpD / 252 Spe
Timid Nature
- Slack Off
- Baton Pass
- Minimize
- Defog

Inb5 Imposter (Mewtwo-Mega-Y) @ Spooky Plate
Ability: Mold Breaker
Shiny: Yes
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Stored Power
- Judgment
- Secret Sword