Steelix
With a base Defense stat of 200, there is absolutely no question about what Steelix’s role is: stop physical attackers right in their tracks. It has a fairly forgettable base HP stat of 75, but that massive Defense helps pick up the slack. And as always, being a Steel type works magic for a defensive Pokemon. Together, Steelix should be an incredible wall. Unfortunately, from here on out, things are a little rough for Steelix. Steelix is all of slow, not incredibly powerful, and has pretty bad Special Defense. Let’s remember that Steelix is a Steel/Ground type, which leaves him weak to both Water and Fire, both of which are commonly found as special attacking moves. A low Special Defense stat coupled with a fairly low HP stat leave Steelix pretty laughable in the eyes of Pokemon carrying such moves as Surf or Flamethrower (or, Arceus forbid, Hydro Pump or Fire Blast). And this isn’t even Steelix’s most glaring flaw. Every defensive Pokemon should have a reliable recovery move, of which Steelix has a resounding zero. So while Steelix can take hits on the physical end, he can eventually be worn down without being able to do very much in return. What a shame.
