Mike Titan (Golurk) @ Punching Glove  
Ability: Iron Fist  
Tera Type: Ground  
EVs: 168 HP / 252 Atk / 45 Def / 45 SpD  
Brave Nature  
IVs: 0 Spe  
- Earthquake  
- Ice Punch  
- Hammer Arm  
- Fire Punch  
Main T-Room sweeper with a bunch of options for effectiveness

Squige (Skeledirge) @ Metronome  
Ability: Blaze  
Tera Type: Fire  
EVs: 204 HP / 252 SpA / 52 SpD  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Torch Song  
- Solar Beam  
- Shadow Ball  
- Encore  
T-Room sweeper that can blast through steel types and set up really well

Definitely Pikachu (Mimikyu) @ Leftovers  
Ability: Disguise  
Tera Type: Ghost  
EVs: 4 HP / 252 Atk / 252 Spe  
Jolly Nature  
- Trick Room  
- Swords Dance  
- Shadow Claw  
- Play Rough 
T-Room setter that can do things without worrying due to disguise and healing off leftovers 

Scapula (Sinistcha) @ Room Service  
Ability: Heatproof  
Tera Type: Grass  
EVs: 192 HP / 100 Def / 216 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Trick Room  
- Nasty Plot  
- Matcha Gotcha  
- Foul Play  
T-Room setter that can tank pretty well and heal up

Lightbringer (Flutter Mane) @ Heat Rock  
Ability: Protosynthesis  
Tera Type: Ghost  
EVs: 252 HP / 252 SpA / 4 SpD  
Modest Nature  
IVs: 0 Atk  
- Sunny Day  
- Trick Room  
- Moonblast  
- Shadow Ball  
Sunny day and T-Room setter that can clean up outside T-Room

Who ya gonna call? (Zoroark-Hisui) @ Sitrus Berry  
Ability: Illusion  
Tera Type: Normal  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Extrasensory  
- Knock Off  
- Phantom Force  
- Will-O-Wisp  
Zoroark is an answer to other ghost teams outside of T-Room