Dragapult @ Heavy-Duty Boots - So that you dont take unnecessary hazards damage, including toxic spikes.
Ability: Infiltrator  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Dragon Dance - Goated set up move.
- Psychic Fangs - At +1 Dynamax, it should kill a toxapex.
- Phantom Force - Stab move, does massive immediate damage and wins games if you spam this at +2 dynamax. 
- Steel Wing - To be able to take on fairies such as clefable, I have this here over dragon claw because if a ditto comes in it cannot kill with psychic fangs or steel wings. They will be forced to go for a fast phantom force and die to your own slow phantom force.
This set is cool because you can generally turn most walls into set up fodder and they somehow do too much damage to you, you can easily dynamax and have 600 + health whilst being able to ohko most threats and walls.