Suicune

Suicune serves as an excellent bulky support Pokemon that is capable of providing a reliable form of speed control consistently.

Its solid bulk and only two weaknesses allow Suicune to tank a wide range of attacks and make it an excellent switch-in to Heatran, Volcarona, Tapu Fini, rain teams, and sand teams.

Suicune further sets itself apart from other bulky Water-types by possessing valuable support options such as Snarl, Tailwind, and Roar. Combined with its excellent bulk, it can apply these moves consistently throughout the battle.

The abundance of Z-Moves and Tapu Koko makes using Suicune harder, as there are now much easier ways to KO it, and as such, they need to be played around carefully.

Tapu Fini and Milotic give Suicune competition in the bulky Water-type role, as they possess somewhat similar levels of bulk and have far more useful abilities.