Shuckle

Shuckle has the highest Defense and Special Defense stats in the game, which would be great if it had a higher HP stat to go along with them. Shuckle functions the best inside of a sandstorm, though, where its already high Special Defense is further increased. Not even Alakazam, which boasts the highest Special Attack in all of UU, can get past Shuckle in a sandstorm.

Although Shuckle's sky-high defensive stats make it seem like a great Pokemon, there are a number of factors stopping it from being as useful as it should be. Shuckle's crippling Stealth Rock weakness, pathetic HP stat, lack of instant recovery, lack of a useful ability, and incredibly limited movepool all play into this. However, with the right support and given the right conditions, Shuckle can still wall most Pokemon until the end of days when the need arises.