You can use shuckle as tank in the sand but without the white herb:
Shuckle @ leftovers/ chesto berry
Evs: 252 hp / 252 spdef / 4 def
- Shell smash
- Knock off
Use this little guy in a sandstorm as special wall.
After 6 shell smashes and in the sand he reaches a special defense of 3354.
Toxic is for stalling and rest for recovery
Knock off for knock down your oppononts items like type resisting berries and life orbs.
this should work as a tank