
and
Urshifu-R is a decent Choice Scarf user in Ubers UU due to its excellent signature move, pivoting in U-turn, priority in Aqua Jet, and solid offensive typing. Surging Strikes’s guaranteed critical hit chance allows Urshifu-R to break through defensive sweepers like Cosmic Power Arceus formes and Zamazenta-C.
Urshifu-R pivots, allowing Magearna to switch in safely, wall special attackers and Psychic or Fairy types that threaten Urshifu, and either set up boosts or pivot with Volt Switch to maintain offensive momentum.
Calm Mind alongside Shift Gear allows Magearna to boost both Speed and power, and with its nearly perfect typing and amazing bulk, it becomes a deadly sweeper.
Stored Power accumulates strength as Magearna grabs boosts, meaning it becomes super-boosted and able to power through Psychic-resistant checks like opposing Magearna, Dialga, and Mewtwo.
Magearna appreciates support from Pokémon that eliminate Dark- and Steel-types that prevent its sweep with Stored Power; in turn Magearna can wallbreak for those Pokémon, making a powerful partnership.