I've been looking for this one for awhile, it doesn't help that it's the most awkward name to search for since either name for the game (the second one is the European name) brings up hundreds of generic results.

Its a DSiWare game and its really awesome, a sequel to X on the Game Boy. People might know the game best by the great remix of the Tunnel Theme in Super Smash Bros. Brawl. The DSiWare game has a similarly addictive soundtrack but I can't find it anywhere.

Please help!