Appearing in "X.E.R.O. Tolerance"Edit
- Abel Stack (Only in flashback)
- Unable to maintain the human guise of Aaron Stack, X-51 finds himself a fugitive from the law! And to add to the heat, fanatical federal agent Peter Gyrich and a mysterious foe of the X-Men also want to pull the plug on our beleaguered Machine Man!
- No special notes.
- No trivia.
Links and ReferencesEdit
- ↑ First and only known appearance to date besides flashbacks
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