Blissey

Blissey's astronomical HP and Special Defense make it the premier special wall of UU. In addition, Blissey has access to a plethora of support moves, such as Wish and Heal Bell, allowing it to aid its team by providing cleric support and tanking all special hits. Its Normal typing gives it only one weakness, and Natural Cure allows it to absorb status effects. In combination, these two traits make Blissey difficult to wear down. Access to Seismic Toss and Toxic are all Blissey needs to not be setup bait. However, even with those options of dealing damage, Blissey is still pretty passive. It also struggles against Pokemon that rely on Substitute, as Seismic Toss does not break a Substitute of a Pokemon with 404 HP or more, and status moves, such as Toxic, do not hit through Substitute. As Seismic Toss is Blissey's only direct attacking option, it is very vulnerable to Taunt and will often find itself doing little for the team if affected by it. Though the Normal-type has only one weakness, it's a very common one in UU, with physical Fighting-type attackers such as Mienshao and Infernape running rampant in the tier. Blissey also suffers a bit from four-moveslot syndrome, as it really wishes it had access to all its support moves. Even so, Blissey is still one of the best walls in the UU tier and finds a home on many defensively minded teams.