The International Tokyo Toy Show 2014 (東京おもちゃショー2014) takes place at the Tokyo International Exhibition Center (Tokyo Big Sight) West Exhibition Hall 1-4 3-11-1 Ariake, Koto-ku, Tokyo on June 12th, 2014 to June 15th, 2014. It is open to the public on June 14th and 15th.
Challenge Cup ~Lizardon Challenge!!~ (チャレンジカップ~リザードンに挑戦!!~) will be available for players to participate in. Those that win will get the Lizardon Trophy Tretta but for those that do not win, they will receive a Darumakka Rookie Tretta instead.
Tretta Leader Kenta (トレッタリーダーのケント) will be on-hand.
All participants will receive a Mega Stone randomly selected from the 5 available as well.
The official Pokémon Tretta website has announced that Rica Matsumoto and Gero will both be on-hand at the Takara Tomy booth in the Tretta corner on June 14th, 2014 and that there will be a performance of the anime theme song
Aim To Be A Pokémon Master (めざせポケモンマスター). 50 tickets will be distributed for the performance.
Sources:
http://www.toys.or.jp/toyshow/event_outline_en.html and
http://www.pokemontretta.com/event/e140521/