I actually run a different Shuckle, it's gimmicky but hey, it's so fun to use and I love it!
Shuckle @Leftovers/@Chesto Berry
Trait: Contrary
EVs: 252HP / 252Def / 6SDef
Relaxed Nature (+Def, -Spd) OR Bold Nature (-Atk, +Def)
0 IVs in Spd
Shell Smash
Toxic
Rest
Infestation
Ahh, how much I...