Melmetal @ Choice Band
Ability: Iron Fist
Tera Type: Steel
EVs: 252 Atk / 4 Def / 252 SpD
Brave Nature
IVs: 0 Spe
- Double Iron Bash
- Earthquake
- Darkest Lariat
- Ice Punch
Gholdengo @ Choice Scarf
Ability: Good as Gold
Tera Type: Steel
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Flash Cannon
- Shadow Ball
- Thunderbolt
- Dazzling Gleam
Archaludon @ Custap Berry
Ability: Sturdy
Tera Type: Steel
EVs: 252 HP / 252 SpA
Mild Nature
IVs: 0 Atk / 0 Def / 0 SpD / 0 Spe
- Metal Burst
- Steel Beam
- Draco Meteor
- Aura Sphere
Stakataka @ Air Balloon
Ability: Beast Boost
Tera Type: Ghost
EVs: 252 Atk / 252 Def / 4 SpD
Brave Nature
IVs: 0 Spe
- Trick Room
- Earthquake
- Heat Crash
- Gyro Ball
Bronzong @ Focus Sash
Ability: Levitate
Tera Type: Steel
EVs: 124 HP / 252 Def / 132 SpD
Sassy Nature
IVs: 0 Spe
- Trick Room
- Stealth Rock
- Explosion
- Gyro Ball
Iron Treads @ Assault Vest
Ability: Quark Drive
Tera Type: Ground
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Zen Headbutt
- Earthquake
- Supercell Slam
- Iron Head
Melmetal's the trick roomie. Choice band DIB hits almost everything super hard, and high flinch chance under trick room.
Gholdengo is equipped with a choice scarf to outspeed non-scarfers and hit hard with its already high special stat. It's also a good switch-in to threats like toxic and will-o-wisp.
Archaludon AKA bane of sweepers is pretty good. It can knock out up to two opposing mons. Minimal defensive EVs make it take more damage, so it can retaliate with metal burst. Custap berry is good for it to hit first next turn.
Stakataka is also a trick roomie. Air balloon is to annoy opponents by stopping them from using their ground moves. Sadly teras don't exist in Mono.
Bronzong is my trick room setter. Sash ensures that it always gets a room set up (unless multi hit or taunt). Explosion is to make sure that Bronzong can do some damage before going down.
Treads has assault vest for better special bulk, and its moves cover a large amount of typings.
Let me know your thoughts.