Mimikyu is making its Pokémon GO debut as part of the A Shockingly Good Time event, marking the first time the Disguise Pokémon has appeared in the game. Known for its unique ability, Mimikyu can block a Charged Attack once per battle, giving it a strategic edge before its Defense drops for the rest of the fight. The addition shakes up battle strategies, especially in PvP, where timing and survivability can make a big difference. Its arrival also adds another fan-favorite to the roster, giving players a new option to experiment with during the event and beyond.
Source: Official Pokémon GO blog and Pokemon.com