Mawile @ Mawilite  
Ability: Intimidate  
EVs: 92 HP / 252 Atk / 164 Spe  
Adamant Nature  
- Sucker Punch  
- Fire Punch / Knock Off  
- Fairy Charge  
- Swords Dance

Is now Dark/Fairy
Other Options: Minimum Speed and max HP investment on Trick Room, Ice Punch, Iron Head, Focus Punch, Stealth Rock (can heavily damage both Housekeeping Pokemon on switch in, but Jirachi forces it out)