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Mr X is an anthropomorphic dog.

DescriptionEdit

Mr X's Island

The island Mr X lives on.

This wild-haired ball of nerve is a genius inventor and fiendish criminal. X has never been caught and identified, thanks to his constant inventions always getting him out of the police's reach at the last minute. X lives on a floating castle, where his assistant is a trained monkey called Kilgore. X considers the Phantom Blot to be his only friend.

Behind the scenesEdit

Mr X first appeared in the 1964 story The Phantom Blot Meets the Mysterious Mr X.

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