Madrox the Multiple Man started as kind of a joke, as the villain in Giant-Size Fantastic Four #4. Not that the joke isn’t funny. Here’s what happens when Madrox is slapped at birth…
The team struggles against Madrox.
Until the cavalry arrives on a helicopter tractor beam.
Professor X saves the day with mind control, renewing my question: If he’s willing to do this, then there should never be any problems in the world. He can do it all the time.
Why did a regular future member of several X-teams get his debut in an issue of Fantastic Four? Why, because Len and Chris wrote the issue!
Fortunately, Peter David got the character into X-Factor and turned him into a noir-ish fellow tormented by his own fracturing psyche. Madrox, when written by David, is probably one of the most complex and intricately developed characters in the Marvel Universe.
Fun fact: According to the great CBSBG site, he started out as “Zerrox the Multiple Man” before Xerox threatened litigation.