We're leaving (Arceus-Fairy) @ Covert Cloak  
Ability: Soundproof  
Tera Type: Fairy  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Spirit Shackle  
- Strength Sap  
- Haze  
- Perish Song  

Together (Blissey) (F) @ Choice Scarf  
Ability: Scrappy  
Tera Type: Normal  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Final Gambit  
- Glare  
- Trick  
- Parting Shot  

But still (Giratina) @ Choice Scarf  
Ability: Scrappy  
Tera Type: Ghost  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Final Gambit  
- Glare  
- Trick  
- Encore  

It's farewell (Yveltal) @ Clear Amulet  
Ability: Simple  
Tera Type: Dark  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Victory Dance  
- Strength Sap  
- Power Trip  
- Spirit Shackle  

And maybe (Dialga-Origin) @ Mental Herb  
Ability: Prankster  
Tera Type: Steel  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Atk  
- Stealth Rock  
- Spikes  
- Taunt  
- Destiny Bond  

We'll come back (Lunala) @ Spooky Plate  
Ability: Simple  
Tera Type: Psychic  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Final Gambit  
- No Retreat  
- Judgment  
- Stored Power