Its American counterpart, "Robots in Disguise" Leader Ultra Magnus, was originally released in 2001. It is similar to the Japanese release, only with the Japanese voice replaced with the English voice (with the phrase, "Ultra Magnus, Transform!"). Autobot emblems have been placed on the side panels in this version. Much like the Japanese version, this figure combines with Optimus Prime's normal robot mode to form Omega Prime, with a different set of voice and sound clips ("Optimus Prime, Ultra Magnus, Combine!" and "Omega Fire!").