| 1 | Ultimate X-Men | 1st appearance of Professor X (Ultimate); 1st appearance of Cyclops (Ultimate); 1st appearance of Marvel Girl (Ultimate); 1st appearance of Iceman (Ultimate); 1st appearance of Beast (Ultimate); 1st appearance of Storm (Ultimate); 1st appearance of Colossus (Ultimate); 1st appearance of Wolverine (Ultimate); 1st appearance of Brotherhood of Mutants (Ultimate); 1st appearance of Magneto (Ultimate); 1st appearance of Quicksilver (Ultimate); 1st appearance of Scarlet Witch (Ultimate); 1st appearance of Toad (Ultimate); 1st appearance of Sentinels (Ultimate); 1st appearance of Boliver Trask (Ultimate); 1st appearance of X-Men (Ultimate) |
| 1/H | Ultimate X-Men | 1st Appearance of Professor X (Ultimate); 1st Appearance of Cyclops (Ultimate); 1st Appearance of Marvel Girl (Ultimate); 1st Appearance of Iceman (Ultimate); 1st Appearance of Beast (Ultimate); 1st Appearance of Storm (Ultimate); 1st Appearance of Colossus (Ultimate); 1st Appearance of Wolverine (Ultimate); 1st Appearance of Brotherhood of Mutants (Ultimate); 1st Appearance of Magneto (Ultimate); 1st Appearance of Quicksilver (Ultimate); 1st Appearance of Scarlet Witch (Ultimate); 1st Appearance of Toad (Ultimate); 1st Appearance of Sentinels (Ultimate); 1st Appearance of Boliver Trask (Ultimate); 1st Appearance of X-Men (Ultimate) |
| 1/NS | Ultimate X-Men | 1st appearance of Beast (Ultimate); 1st appearance of Boliver Trask (Ultimate); 1st appearance of Brotherhood of Mutants (Ultimate); 1st appearance of Colossus (Ultimate); 1st appearance of Cyclops (Ultimate); 1st appearance of Iceman (Ultimate); 1st appearance of Magneto (Ultimate); 1st appearance of Marvel Girl (Ultimate); 1st appearance of Professor X (Ultimate); 1st appearance of Quicksilver (Ultimate); 1st appearance of Scarlet Witch (Ultimate); 1st appearance of Sentinels (Ultimate); 1st appearance of Storm (Ultimate); 1st appearance of Toad (Ultimate); 1st appearance of Wolverine (Ultimate); 1st appearance of X-Men (Ultimate) |
| 1 | Ultimate X-Men (Marvel UK) | 1st appearance of Professor X (Ultimate); 1st appearance of Cyclops (Ultimate); 1st appearance of Marvel Girl (Ultimate); 1st appearance of Iceman (Ultimate); 1st appearance of Beast (Ultimate); 1st appearance of Storm (Ultimate); 1st appearance of Colossus (Ultimate); 1st appearance of Wolverine (Ultimate); 1st appearance of Brotherhood of Mutants (Ultimate); 1st appearance of Magneto (Ultimate); 1st appearance of Quicksilver (Ultimate); 1st appearance of Scarlet Witch (Ultimate); 1st appearance of Toad (Ultimate); 1st appearance of Sentinels (Ultimate); 1st appearance of Boliver Trask (Ultimate); 1st appearance of X-Men (Ultimate) |