Each set of Core Medals comes in a specific color and animal type. Red Core Medals have bird powers; yellow Core Medals have big cat powers; green Core Medals have insect powers; silver Core Medals have heavy mammal powers; blue Core Medals have marine animal powers; purple Core Medals have dinosaur powers; and orange Core Medals have reptilian powers. There are 70 Core Medals total from the series, each three from a Greeed divided in three groupings for the use of OOO: Head, Arms (Torso), and Legs. They have either one, two, or three horizontal bars on their backs, respectively, to indicate which corresponding OOO Driver slot they are compatible with.