Protoform Optimus Prime

In the 2007 live-action film Transformers, Autobots en route to Earth change their alternate modes into structures called space travel pods and enter the planet's atmosphere in the same way as a meteor. Thereafter, the Cybertronians change to a humanoid shaped endoskeleton structure known as Protoform.

Once they arrive, Cybertronians in protoform state will transform into an equally detailed yet generic & undefined robot mode to allow them more stable ground mobility in order to search for an adaptable disguised form (aka vehicle mode); upon which scanning and replication are initiated and completed within seconds, giving them their now-unique physical characteristics. These near-identical transformable skeleton-like forms are referred as protoforms. A protoform retains the same mass as the final appearance of a Cybertronian with a chosen vehicle mode after scanning & replication are complete, so one protoform can be larger and/or smaller than another.



ALTERNATE MODE



Robot Mode