The history of this incarnation of the mutant superhero team known as X-Men most likely mirrors that of their Earth-616 counterparts. Like the Earth-616 X-Men, they are based at Xaviers Institute.
The young superhero team Power Pack ran into both individual members of the team, and the team as a whole, on several occasions. The first time the entire team was seen together was when the X-Men fought the Marauders. Power Pack tried to help, but only ended up getting in the way, causing the X-Men to loose the battle. They made up for their mistake later on by rescuing Cyclops from the Marauders.
- 17 X-Men (Earth-5631) Members
- 3 Appearances of X-Men (Earth-5631)
- Minor Appearances of X-Men (Earth-5631)
- Media X-Men (Earth-5631) was Mentioned in
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- Team Gallery: X-Men (Earth-5631)