Transformers: Energon had the premise of the Autobots being able to combine with each other, and Optimus Prime had his own team to do this with. Along with four vehicles that could unite with him ...

Featured in: Transformers: Dark of the Moon (2011 ... he has since been reborn as Optimus Prime to protect Cybertron and let Energon flow throughout Iacon and the planet itself so that life ...