Zero
Zero (X-Men, MLF, usually from Earth-4935) appears in 29 issues in grailworth's catalog, and was first published in 1990. First appearance: New Mutants #86 (1983), cover dated 1990. Key issues with Zero include New Mutants #87 (1983).
First appearance
Key issues
Every appearance we value
Askani Son (1996) 4 issues
Cable - Blood and Metal (1992) 2 issues
Deadpool: The Circle Chase (1993) 2 issues
New Mutants (1983) 4 issues
Stryfe's Strike File (1993) 1 issue
Ultimate X-Men (2001) 3 issues
X-Factor (1986) 1 issue
X-Men (1963) 2 issues
X-Men (1991) 3 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.