Lucario @ Life Orb
Ability: Magic Guard
EVs: 252 SpA / 4 SpD / 252 Spe
Mild/Hasty Nature
- Steel Beam
- Close Combat
- Stone Edge/Substitute/Vacuum Wave
- Psychic/Substitute/Vacuum Wave
other option: nasty plot to take advantage of passive mons + switches + beats corv harder now + stronger vwave, -spdef nature has some tiny benefits so a one liner on that, 104 atk 252 spa 152 spe mild outspeeds tran and gets some better rolls vs rachi spdef ferro and spdef tran
the sample set on the dex uses eq, which hits nothing really, and I've found an extra coverage/sub to be quite useful.