Golduck

With its unique access to Cloud Nine, Golduck is one of the very few sand-immune Calm Mind users in OU. This gives it a rare niche as a Salac Berry sweeper that does not care about Tyranitar's Sand Stream, enabling it as a late-game sweeper that does not require weather control support on offensive builds. Even more uniquely, Golduck is able to check weakened weather sweepers like Ludicolo, Kingdra, and Exeggutor that would otherwise rely on Swift Swim or Chlorophyll to outspeed it. With these traits, Golduck can even go as far as to outclass Suicune on certain offense teams with Tyranitar, taking its place as a more offensively oriented Calm Mind threat that does not care about its partner's sand. However, its low Special Attack and unimpressive bulk severely restrict its viability as a potential wincon, with special walls like Blissey and Snorlax able to shrug off its attacks and handle it with ease, while its limited movepool struggles to hit opposing Water-types like Suicune. An unfortunate consequence of its ability is that Cloud Nine gives sand-weak foes the opportunity to gradually heal with Leftovers, making checks like Snorlax even harder to wear down. These cons altogether leave Golduck as a less-than-desirable setup sweeper with a single set that only borders on viability, barely managing to eke out an existence on the edge of special offense.