Fusion Leonidas (フュージョンレオニダス Fu~yūjon Reonidasu) is the evolution Omega Leonidas and is an one-of-a-kind dragon-like Bakugan who was born in the Doom Dimension in the Bakugan: Battle Force series. He is a Darkus Leonidas from the Doom Dimension. He is Ken Ikenami's Guardian Bakugan.