Shuckle

In a nutshell, Shuckle is a bad Pokemon. Despite its massive defenses, it comes with many flaws. It has an absolutely horrendous base 20 HP, which makes it not as bulky as its defenses might suggest. Shuckle also lacks any offensive presence whatsoever—not even Seismic Toss—which leaves it setup fodder for many Pokemon. Shuckle's typing is also not remarkable defensively, only giving it one useful resistance in Normal. What Shuckle can do is wall common Normal-types, set up Stealth Rock, and use a couple of utility moves such as Encore, Knock Off, and Toxic. However, this is not enough to justify Shuckle's use, as all of these things can also be done by much better NU Pokemon. Overall, Shuckle is much more trouble than it's worth, and one who intends to build a serious team should stay as far away from it as possible.