Nintendo has issued a press release stating that at the Penny Arcade Expo in Seattle tomorrow, attendees who visit the Nintendo booth will be able to play Pokemon Rumble, the English name of Melee! Pokemon Scramble. You can read an excerpt of the press release below. No release date is known yet.
Additionally, Nintendo will debut a new WiiWare game at the booth: Pokemon Rumble. Pokemon Rumble lets you battle with Pokemon 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.