This Japanese exlcusive, black & gold recolor of the Voyager Optimus Prime figure was a store exclusive with a limited amount of stock available world wide.
To prevent infection by the dark energon virus, Optimus Prime is coated in a defensive black alloy. This black coating was modified by Ratchet from the technology of an anti-government group called "Mech". It can totally prevent the effect of the Dark Energon virus and other biological weapons. Although the increased weight reduces his mobility, it is the only way to defend against the spread of Dark Energon!