Niche Pokemon in OnslaughtMons #3 (Bisharp) @ Eviolite  
Ability: Defiant  
Tera Type: Dark  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Pursuit  
- Sucker Punch  
- Iron Head  
- Swords Dance  
- Bisharp is an RU (RarelyUsed) Pokémon that is probably not thought about much when teambuilding. However, in OnslaughtMons, this Pokémon is actually an overpowered f***. This Pokémon only has 10 less attack than Kingambit, one of the most powerful Pokémon in the format, but has a better speed and bulk, given that it can hold the Eviolite item, and access to most of the moves Kingambit has like Sucker Punch, Pursuit, Knock Off, Iron Head, and Swords Dance. While this normally wouldn't be considered to be better than Kingambit, running both Kingambit and Bisharp in OnslaughtMons would take up less relative team space compared to other formats, making this a good "backup" Kingambit that can fit on most offensive teams. Bisharp also allows you to run both a strong priority sweeper (Eviolite Bisharp) and an overwhelming Pursuit eliminator (Choice Band Kingambit).