GT Cube is a racing video game release in 2003 by MTO for GameCube. The game was re-released as GT Pro Series for Wii in 2006.
Source: Wikipedia, "GT Cube", available under the CC-BY-SA License.
GT Cube is made by using cel-shading graphics and it's based on GT Advance series which was released on GameBoy Advanced. GT Cube is released only in Japan.