Shuckle

Oh Shuckle, I remember first battling one, it was the longest stall I ever had at the time. Shuckle just refuses to die to anything that is not super effective, and rightfully so. With the highest defense and special defense in the game, combo that with the ability to raise his special defense in sand storm due to rock typing, it is one tough pokemon to take out. There are two down sides to Shuckle though, really low HP stat, and lack of a one turn recovery, so it has to rely on rest. None the less it fits well with any sandstorm team, or just as a wall in general.

Classic Shuckle

Ability : Sturdy/Gluttony

Moves :

Knock off
Toxic
Encore
Rest

Ev's : 252 HP/ 148 Def / 104 Sp Def
Nature : Impish

You can use stealth rock in this set if you wish, but I personally suggest using a different pokemon to set up for that.

Acupressure :

Rock slide
Acupressure
Rest
Earthquake

Same Ev's and Nature as above

Also usable on this set is toxic, knock off, stone edge, bug bite. Remember this set is a bit of a gimmick, so it can and will let you down at times.


Conclusion

Due to his weakness to stealth rock, low hp, and only recovery being rest, you really need to bring multiple supporters for your Shuckle. Suggested team mates need to have rapid spin, aromatherapy, heal bell, and the ability to take on its biggest threats steel, rock, and water types. With all of that in mind, Shuckle can be one of the biggest attributes to any team, just need to play a little smart.