Marvel
| Name | Super Name | Code | Actions |
|---|---|---|---|
| Mister Sinister | Mister Sinister | Mister… | Show |
| Mister X | Mister X | Mister… | Show |
| Misty Knight | Misty Knight | Misty-… | Show |
| Mitchell Carson | Mitchell Carson | Mitche… | Show |
| Mockingbird | Mockingbird | Mockin… | Show |
| MODAM | MODAM | MODAM | Show |
| MODOK | MODOK | MODOK | Show |
| Modred the Mystic | Modred the Mystic | Modred… | Show |
| Modular Man | Modular Man | Modula… | Show |
| Mojo | Mojo | Mojo | Show |
| Molecule Man | Molecule Man | Molecu… | Show |
| Mole Man | Mole Man | Mole-M… | Show |
| Molly Hayes | Molly Hayes | Molly-… | Show |
| Molten Man | Molten Man | Molten… | Show |
| Mondo | Mondo | Mondo | Show |
| Mongoose | Mongoose | Mongoo… | Show |
| Monica Rappaccini | Monica Rappaccini | Monica… | Show |
| Monsteroso | Monsteroso | Monste… | Show |
| Montana | Montana | Montana | Show |
| Moon-Boy | Moon-Boy | Moon-B… | Show |