Black Bumblebee Keychain

Box front
When the keychains were released in Japan, they were released in a similar format to the PVCs where they were in unmarked boxes. In each box of 12 keychains was a limited black version of one of the 4 characters.
Box side
The side of the box shows a silver Bumblebee which is presumably an ultra rare find. I have yet to see one of these surface.
Robot mode
Car  mode