Mew

After residing in Uber for the DPP era, Mew finds itself in the odd position of being demoted two tiers to the UU tier. While Mew still has its classic movepool that features every TM and move tutor move in the game, it cannot make up for its bland Psychic typing and decent, but not outstanding, stat distribution. In UU however, Mew is one of the most versatile Pokemon, as it can take on almost every role and position. With access to a wide variety of boosting moves, such as Nasty Plot, Swords Dance, Calm Mind, and Bulk Up, Mew can turn into a powerful sweeper. Mew can also run an equally dangerous support set that can act as a stallbreaker, while continuously walling dangerous threats and shutting them down with Will-O-Wisp. While Mew doesn't have the power of the tier's strongest sweepers or the bulk of the tier's sturdiest walls, it can more than make up for it with its astounding versatility that makes Mew a great pick on any team.