This Pokémon will change into its at the start of Round 3 in Battle Mode.
In Search Mode, the silhouette of one Pokémon in a location that does not already have one will be revealed, or the full image of one Pokémon in a location that already has a silhouette will be revealed.
This Pokémon can fuse with the following Tretta to create a new Pokémon at the start of Round 3 in Battle Mode:
As long as the player has a Tretta Report, this Tretta will activate the Secret Ticket when used in Battle Mode. This Secret Ticket will summon Wobbuffet, and will allow the player to deal extra damage if they attack second in the current Round.
This Tretta was awarded as a prize at the Challenge! Mega Strong! Mega Evolution Battle event held at the 40th Next Generation World Hobby Fair, which took place at Makuhari Messe, Chiba on June 28 and 29, 2014. It was awarded again in the same manner at several later events. Details of these events are as follows:
As part of the Pokémon Center Summer Festival in Centrair, held at the Chūbu Centrair International Airport, Nagoya from July 19 to 21, 2014, and on August 23 and 24, 2014.
As part of Kids Game Festa 2014 Summer, which was held at several locations across Japan between July 26 and September 7, 2014.
As part of the Ciao Summer Festival, held at the Kobe International Exhibition Hall, Kobe on July 27, 2014, and at Pacifico Yokohama, Yokohama on August 9 and 10, 2014.
At the Tohoku Children's Expo, Sendai on October 12 and 13, 2014.
As part of the Shōwa Autumn Festival, held at several locations in Gunma Prefecture on October 5, 2014.
At two venues hosting the Pokémon Card Game Battle Festa 2014: Sunshine City Bunka Kaikan, Tokyo on the weekend of November 1-2, 2014, and at Intex Osaka, Osaka on November 16, 2014.
As part of the Pokémon Center Autumn Pokémon Tretta Event, which hosted the Challenge! Mega Strong! Mega Evolution Battle from November 8 to 16, 2014.
At LALA Garden Tsukuba, Ibaraki on November 23, 2014.
At the Mibu Toy Complex Charity Bazaar, Mibu on December 13 and 14, 2014.
At Tecmopia Paltelon in Utsunomiya on January 12, 2015.
The focal Pokémon for this challenge was Mewtwo and its two possible Mega Evolutions. As with previous events, entrants were tasked to defeat it in one of four possible teams of three Pokémon. These teams are detailed below.
Players who managed to defeat Mega Mewtwo Y were awarded this Tretta. Players who did not manage to defeat Mega Mewtwo X or Mega Mewtwo Y at these events were instead awarded a Heracross Tretta. All participants were also given one of five possible Mega Stones at random to be used with the interactive Pokémon Mega Ring, and a Mega Stone Encyclopedia Art Board. The five stones available were Absolite, Lucarionite, Charizardite Y, Charizardite X, and Garchompite. The Mega Stones were only distributed at the World Hobby Fair event, and the Mega Stone Encyclopedia Art Board was only available at the World Hobby Fair and Ciao Summer Festival events. Participants with the three highest scores at the Pokémon Card Game Battle Festa 2014 events and LALA Garden Tsukuba event were also awarded a certificate.