Giratina-Origin @ Griseous Core  
Ability: Levitate  
Tera Type: Poison  
EVs: 248 HP / 196 Atk / 52 SpD / 12 Spe  
Adamant Nature  
- Poltergeist  
- Dragon Tail  
- Defog  
- Toxic
 
Marshadow @ Choice Band  
Ability: Technician  
Tera Type: Ghost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Poltergeist  
- Spectral Thief  
- Low Kick  
- Shadow Sneak

Giratina Origin + Marshadow

Giratina Origin and Marshadow use their powers from beyond the grave to form a deadly Ghost Spam core, overwhelming shared checks such as support Arceus forms, and Yveltal with relative ease. Giratina even coming with the added bonus of being able to switch in on and pressure Primal Groudon for Marshadow, allowing them to very consistently pressure most balance teams who are struggle to deal with one of them, let alone both. This allows them together to completely dominate teams reliant on support Arceus to keep both in Check, as preventing themselves from getting worn down by the combine efforts of both becomes extremely difficult with Marshadow's raw power, and Giratina's Dragon Tail racking up chip damage on all Arceus Forms bar Fairy, and Toxic putting them all on a timer.

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