Stereoscopic 3D is a Nintendo 3DS feature that a lot of games have taken advantage of, but it looks like Kirby Battle Royale will not be among them. The box art for the game has a notice on the bottom that Kirby Battle Royale “plays only in 2D”, confirming that Kirby Battle Royale will not have stereoscopic 3D. Kirby Battle Royale releases on the Nintendo 3DS on November 3rd in Europe and January 19th in North America.

Source