Blackcat (G1)

Blackcat is an Autobot from the Generation 1 continuity family.

You can't see me!

_{This character has no official visual representation in any Transformers product or media... yet, at least.}

Blackcat is, despite his name, a green recolor of Ravage. He seems to spend most of his time in the Ark making puzzles.

Fiction

Marvel Comics continuity

Condor-Verlag Transformers Comic-Magazin

Blackcat was on night watch duty in the Ark. Bored, he used the computer to create a puzzle of a Jhiaxus-looking seeker attacking a strangely colored Mirage. If you complete the puzzle in under a minute, he will think that you are great. (source)