Iron Man

DUH-NUH-NUH-DUH-NUH-DUNUNUNUNUNUNUH-NUH-NAH-NAH!

He first appeared fighting for TMV.

Then he appeared fighting for Tahar'ok.

Afterwards, he vanished after being deemed too god-moddy.

Then he came back and started fighting for Yon.

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Then he came back again and started fighting against the Great Beings' armies. Make your mind up, man!