In perhaps one of the more bizarre cross overs in Marvel comics history Captain Britain once teamed up ( sort of ) with cartoon miscreants Beavis and Butt-Head in issue 13 of their 1995 Marvel series.
OK technically its more of an appearance than a cross over but it’s just one of many Captain Britain comics that I’m going to show where you think WTF is the good Captain doing here !
The Captain Britain fans' page and blog. 