Banned in gen 3 (Latias) @ Leftovers  
Ability: Levitate  
Tera Type: Fairy  
EVs: 252 HP / 160 Def / 96 SpA  
Modest Nature  
IVs: 0 Atk  
- Draining Kiss  
- Calm Mind  
- Mist Ball  
- Recover  

banned from UU (Garganacl) @ Leftovers  
Ability: Purifying Salt  
Tera Type: Water  
EVs: 252 HP / 4 Def / 252 SpD  
Careful Nature  
- Stealth Rock  
- Salt Cure  
- Recover  
- Protect  

Unbanned (Gliscor) @ Toxic Orb  
Ability: Poison Heal  
Tera Type: Water  
EVs: 244 HP / 56 Def / 192 SpD / 16 Spe  
Impish Nature  
- Earthquake  
- Spikes  
- Protect  
- Knock Off  

Banned from Ou (Zamazenta) @ Heavy-Duty Boots  
Ability: Dauntless Shield  
Tera Type: Fire  
EVs: 80 HP / 252 Atk / 176 Spe  
Jolly Nature  
- Close Combat  
- Stone Edge  
- Crunch  
- Roar  

uhh (Sinistcha) @ Heavy-Duty Boots  
Ability: Heatproof  
Shiny: Yes  
Tera Type: Water  
EVs: 252 HP / 160 Def / 96 Spe  
Bold Nature  
IVs: 0 Atk  
- Calm Mind  
- Matcha Gotcha  
- Shadow Ball  
- Strength Sap  

Not banned somehow (Kingambit) @ Black Glasses  
Ability: Supreme Overlord  
Tera Type: Dark  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
- Kowtow Cleave  
- Swords Dance  
- Sucker Punch  
- Iron Head