Hatterene @ Focus Sash  
Ability: Magic Bounce  
Tera Type: Steel  
EVs: 252 HP / 252 SpA / 4 SpD  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Trick Room  
- Healing Wish  
- Psychic  
- Dazzling Gleam  

Calyrex-Ice @ Heavy-Duty Boots  
Ability: As One (Glastrier)  
Tera Type: Fire  
EVs: 248 HP / 252 Atk / 8 SpD  
Brave Nature  
IVs: 0 Spe  
- Glacial Lance  
- High Horsepower  
- Swords Dance  
- Trick Room  

Cresselia @ Leftovers  
Ability: Levitate  
Tera Type: Poison  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Lunar Dance  
- Moonblast  
- Psyshock  
- Trick Room  

Groudon @ Leftovers  
Ability: Drought  
Tera Type: Ghost  
EVs: 252 HP / 4 Atk / 252 Def  
Relaxed Nature  
IVs: 0 Spe  
- Stealth Rock  
- Precipice Blades  
- Will-O-Wisp  
- Bulk Up  

Dialga-Origin @ Adamant Crystal  
Ability: Pressure  
Tera Type: Steel  
EVs: 252 HP / 252 SpA / 4 SpD  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Steel Beam  
- Draco Meteor  
- Earth Power  
- Trick Room  

Magearna @ Eject Pack  
Ability: Soul-Heart  
Tera Type: Water  
EVs: 252 HP / 252 SpA / 4 SpD  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Fleur Cannon  
- Volt Switch  
- Spikes  
- Trick Room