Kingdra

Kingdra is a very lethal threat in the UU tier with its solid stats and unique Water / Dragon typing (which gives it a neutrality to Grass- and Electric-type attacks that most other Water-types are weak to). A lot of Kingdra's lethality is due to its ability to use Rain Dance, doubling its Speed thanks to Swift Swim, as well as Dragon Dance, boosting both Kingdra's Attack and Speed stats, two highlights in a shallow movepool. These two moves allow Kingdra to outspeed much of the UU tier and sweep with a powerful STAB combination resisted only by Empoleon, giving Kingdra a place as one of the most dangerous sweepers in the tier. Kingdra is a Pokemon you must prepare for if you want a successful UU team.