Infinity Trister (Japanese version Tristar (トリスター Torisutā)), known as Tristar in the anime, is a Gundalian Bakugan and Marucho's Guardian Bakugan in Bakugan: Mechtanium Surge. He is Marucho's fifth Guardian Bakugan after Preyas, Diablo/Angelo Preyas, Minx Elfin, and Akwimos. His BakuNano is Crosstriker and his Mechtogan is Accelerak.