Boxcar

Boxcar is an Autobot from the IDW portion of the Generation 1 continuity family.

Boxy... and... Autobotty! Sure that's not meant to be Mainframe or someone?

Boxcar is one of several Autobots in Optimus Prime's lineup of young, inexperienced new Autobots. He's big, and pretty blocky.

Fiction

IDW comics continuity

Optimus Prime decided that, hey, what the hey, let's have a parade line-up and inspect the brand new Autobot troops! Ironhide thought this was a stupid idea and told Prime so. Boxcar just happened to be one of the members of this brand new lineup of dudes. Wonder if we'll ever see him again! All Hail Megatron issue 13