Qwilfish

While Qwilfish is definitely not the first thing that comes to a person's mind when they select a Pokemon for their rain team, it has numerous niches that allow it to perform well in the Uber tier. With its ability Swift Swim, Qwilfish reaches an incredible Speed stat of 538, allowing it to outrun many Scarf users in the metagame. Qwilfish can function not only as a support unit, absorbing and setting up Toxic Spikes, in addition to disrupting walls and sweepers, but also as an offensive rain sweeper. However, Qwilfish does have its faults. Its minuscule defenses make it struggle to take even resisted attacks and will not last long unless played with great care. Overall though, with the right support, Qwilfish can function well even in Ubers, and can surprise unprepared teams.