Hippowdon Rocky Helmet
Ability: Sand Stream
EVs: 252 HP / 252 Def / 4 SpD
Impish Nature
-Yawn
-Whirlwind / Rock Tomb / Ice Fang
-Earthquake
-Stealth rock
(note that slack off is not a practical move in bss)
compared to tough claws charizard X, adaptability mega lucario, or even the recently...