Salazzle

Salazzle's good Speed tier, ability in Corrosion, and solid offensive utility make it a decent support Pokemon in UU. It can outspeed many offensive threats such as Zarude and Azelf, and it takes advantage of defensive staples like Amoonguss and Skarmory. The combination of Knock Off and Toxic lets it outlast Pokemon that would otherwise counter it, such as Tentacruel and Nihilego, and open up counters like Hippowdon for teammates. However, due to its weakness to Stealth Rock, Salazzle is forced to run Heavy-Duty Boots as opposed to a power-boosting item, which makes it heavily reliant on chip damage to make an impact. Its poor bulk also leaves it unable to contribute defensively in most games, and its typing makes it susceptible to priority users like Azumarill and Lycanroc-D. Salazzle's frailty also makes it reliant on pivots to safely enter the battlefield. This frailty also deters it from switching directly into most Pokemon it would otherwise check, especially Scizor and Tangrowth, who both carry Knock Off and can remove its Heavy-Duty Boots. Therefore, it would rather be preserved as a secondary check to the aforementioned Pokemon. It is also extremely difficult for Salazzle to make progress against bulkier Pokemon like Slowking and Hippowdon, but its Toxic support and chip damage can help mid-game wallbreakers and offensive pivots like Mamoswine and Azelf, respectively, break through or pressure them.