The upcoming Penny Arcade Expo in Seattle will give consumers their first-ever chance to play key upcoming Wii™ and Nintendo DS™ games like New Super Mario Bros.™ Wii, The Legend of Zelda™: Spirit Tracks and Mario & Luigi™: Bowser's Inside Story. The recently launched Metroid™ Prime: Trilogy, Wii Sports Resort™ and Professor Layton and the Diabolical Box™ will also be on hand at the Nintendo booth (#352).

Additionally, Nintendo will debut a new WiiWare™ game at the booth: Pokémon Rumble. Pokémon Rumble lets you battle with Pokémon like never before. Up to four players at once can team up and unleash powerful attacks as enemies surround them in this action-packed game.

Melee! Pokémon Scramble (乱戦！ポケモンスクランブル) is the Japanese version of the game which was released on June 16, 2009.

Source: http://press.nintendo.com/