A Prime Problem

A Prime Problem was an episode of the second season of the original Transformers series. It features the first appearance of Powerglide and Warpath (only the former speaks).

Basically, the Decepticons find some corlonium crystals, which make anything electronic that they touch go kaboom unless insulated. Hoping to trick the Autobots into investigating the crystals, Megatron makes a remote-controlled clone of Optimus Prime. Naturally, the Autobots figure things out, the clone goes kaboom, and the Decepticons run away.

That's it in a nutshell.