Slowking

Slowking's great typing, excellent ability in Regenerator, and special bulk make it one of the most reliable pivots and special walls in the metagame, and these traits with the combination of Future Sight and Teleport let it help its teammates to force progress against opposing teams. Regenerator allows Slowking to keep itself healthy, which helps it switch into threats more easily and gives it more opportunities to use Future Sight. With its great bulk and defensive typing, Slowking is able to check threatening specially offensive Pokemon such as Heatran, Nidoking, Tapu Lele, and Latios and use them as Future Sight fodders. However, Slowking is very vulnerable to physical wallbreakers like Landorus-T and Garchomp, as its physical bulk is mediocre and doesn't allow it to tank strong hits from them. Slowking's typing and mediocre physical bulk also leave it very vulnerable to Knock Off and U-turn. This is an issue, as these moves are very frequently run and often safe to use, further limiting Slowking's utility as a defensive pivot. In addition, Toxic is worrisome, as it forces Slowking to use Slack Off more often and limits its potential to consistently switch into dangerous Pokemon such as the aforementioned Heatran, Nidoking, and Tapu Lele.