Is there a particular spread?
Excadrill @ Focus Sash
Ability: Mold Breaker
EVs: 252 HP / 4 Def / 252 Spe
Jolly Nature
- Rock Tomb / Steel Beam
- Rapid Spin
- Earthquake
- Stealth Rock
Mew @ Red Card / Mental Herb
Ability: Synchronize
EVs: 252 HP / 4 Atk / 252 Spe
Jolly Nature
- Taunt
- Spikes
- Explosion
- Stealth Rock
Ability: Mold Breaker
EVs: 252 HP / 4 Def / 252 Spe
Jolly Nature
- Rock Tomb / Steel Beam
- Rapid Spin
- Earthquake
- Stealth Rock
Mew @ Red Card / Mental Herb
Ability: Synchronize
EVs: 252 HP / 4 Atk / 252 Spe
Jolly Nature
- Taunt
- Spikes
- Explosion
- Stealth Rock
These is usually what you would see. On Excadrill, you have spin to deny opposing hazards and rock tomb so that faster mons will be slowed down. Excadrill is usually the type where 'either you kill me or set rocks but you can't do both'. I guess steel beam could also be used if you want to kill yourself or something
On Mew the gameplan is simple. You don't die in one hit so you don't need the sash and you have double hazards. This thing really fuels hazard stacking teams with Bisharp or Galarian Zapdos