MONO STEEL

Melmetal @ Choice Band  
Ability: Iron Fist  
Tera Type: Steel  
EVs: 252 HP / 252 Atk / 4 SpD  
Adamant Nature  
- Double Iron Bash  
- Earthquake  
- Thunder Punch  
- Ice Punch  

Gholdengo @ Air Balloon  
Ability: Good as Gold  
Tera Type: Fighting  
EVs: 4 HP / 252 SpA / 252 Spe  
IVs: 0 Atk  
- Shadow Ball  
- Make It Rain  
- Nasty Plot  
- Recover  

Scizor-Mega @ Scizorite  
Ability: Technician  
Tera Type: Bug  
EVs: 248 HP / 252 Atk / 8 Def  
- Swords Dance  
- Bullet Punch  
- Knock Off  
- Roost  

Heatran @ Air Balloon  
Ability: Flash Fire  
Shiny: Yes  
Tera Type: Fire  
EVs: 252 HP / 4 SpA / 252 SpD  
Timid Nature  
IVs: 0 Atk  
- Magma Storm  
- Earth Power  
- Taunt  
- Toxic  

Stakataka @ Rockium Z  
Ability: Beast Boost  
Tera Type: Rock  
EVs: 252 HP / 252 Atk / 4 SpD  
Brave Nature  
IVs: 0 Spe  
- Trick Room  
- Gyro Ball  
- Stone Edge  
- Earthquake  

Celesteela @ Leftovers  
Ability: Beast Boost  
Tera Type: Steel  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
- Heavy Slam  
- Flamethrower  
- Rock Slide  
- Protect