Robot Fight finished!

Calling this one done.

A little bit about the tough parts:
The original rig was unable to transform, so I modeled a basic truck and cut it into pieces to enable transformation. I animated Optimus getting up from a low crouch into a run. I hand animated his pieces and the pieces of the original truck in order to get a transformation that worked from the camera.
I added other features to the Optimus rig, including toe controls, wheel controls, chest plate controls and his sword.

To give credit where credit is due, the Optimus Prime rig is by Gary Wee, the LowRobo rig is by Ila Soleimani, and the Norman rig is by Leif Jeffers, Morgan Loomis, Peter Starostin, and Neal Thibodeaux.

Here's the transformation with some sound. I think it's pretty cool.