>>22292840Slow, low HP, and limited move pool. It tries to make up for it with pretty good defenses and a very high special attack, but unless you got trick room going, it's going to get slammed hard.
To note, I do use Glaceon as a member of my main team, and glaceon, with hail support + Trick Room is a very heavy hitter. But it's a lot of support I don't really want to depend upon.