Mew first appeared in a flashback in Enter Pikachu!, four years prior to the events of Pokémon - I Choose You!. Goh and Chloe spotted it while attending Professor Oak's Summer Camp, where it was seen battling a Nidoking. Mew soon ran off, leading Goh and Chloe to chase it. Mew saved a baby Kangaskhan from a fall before leaving. After reporting this to Professor Oak, Goh became determined to make Mew his first capture.
Mew reappeared in the present day in Dreams Are Made of These!, where it Transformed into a Lugia and attacked Team Rocket, who had captured Ash's Pikachu, Goh's Raboot, and Chloe's Yamper, freeing the trapped Pokémon. Everyone thought it was Lugia, but once it left, Mew revealed itself.
In Advice to Goh!, Goh learnt of Project Mew, a team tasked with searching for legendary Pokémon with the aim of searching for and locating Mew. Goh joined Project Mew in Leaping Toward the Dream! in the hope of achieving his goal of catching Mew.
In The Mew from Here!, Goh along with the other members of Project Mew arrived on Faraway Island and began their search for Mew. Unbeknownst to them, Mew was following them. It Transformed into the Legendary Pokémon Groudon and Kyogre and attacked the members of Project Mew. It lead them to the center of Table Mountain and turned back into its base form, where it shared a vision about the creation of the world with them. After this, it challenged them to a battle. It playfully defeated a number of their Pokémon before charging a powerful Hyper Beam. Goh stood his ground against it and thanked Mew for giving him a goal to strive for, as it led him to where he is now. The expression of gratitude caught Mew off-guard, and it proceeded to stop its attack and heal the surrounding Pokémon. It then Teleported into Goh's outstretched hand before laughing and Teleporting away.
Personality and characteristics
Mew is a strong Pokémon, capable of holding its own in battle, as seen during the flashback in Enter Pikachu!, where it held off against Nidoking's attacks and fought back with the same moves. In In the Palms of our Hands!, it was shown knocking out many Pokémon with ease and overpowering many attacks with its versatile moveset. It is able to Transform into more than one Pokémon at once.
Mew is also kind and helpful, as seen in Enter Pikachu!, where it saved a baby Kangaskhan from a fall and Dreams Are Made of These!, where it helped free the trapped Pokémon from Team Rocket's clutches.
Mew appears as a promotional reward puck that premeired in Pokémon Ga-Olé's Grand Rush set 4. For an additional ¥100, player could obtain promotional disks following battles with Goh or Ash, with 'WINNER' versions available to players who successfully defeated their teams in Trainer and Battle mode. Players facing Ash could receive a Mew disk or a Lugia disk.
