Fan Casting Overload in The Transformers

Overload is an Autobot powerhouse. On his own, he's strong, massive, and covered with guns and artillery. On top of this, he can combine with Optimus Prime, forming an enormously powerful set of cannons for the Autobot leader. Just who or even what Overload is depends on which universe one is in, or whatever source you find. Sometimes "Overload" is simply the name used by the Mini-Con Rollout when he combines with his armored trailer. And sometimes the trailer itself is Overload, a separate living entity or weapons platform... who uses someone else to form his robot-mode chest and head. transforms into a Cybertronian weapons trailer/aircraft launcher with spring-loaded missiles.