Marvel
| Name | Super Name | Code | Actions |
|---|---|---|---|
| Joseph | Joseph | Joseph | Show |
| Josiah X | Josiah X | Josiah… | Show |
| Joystick | Joystick | Joysti… | Show |
| J'son | J'son | J-son | Show |
| Jubilee | Jubilee | Jubilee | Show |
| Jude the Entropic Man | Jude the Entropic Man | Jude-t… | Show |
| Juggernaut | Juggernaut | Jugger… | Show |
| Julie Power | Julie Power | Julie-… | Show |
| June Covington | June Covington | June-C… | Show |
| Junior Juniper | Junior Juniper | Junior… | Show |
| Junkpile | Junkpile | Junkpi… | Show |
| Junta | Junta | Junta | Show |
| Junzo Muto | Junzo Muto | Junzo-… | Show |
| Justice (New Universe) | Justice | Justic… | Show |
| Justin Hammer | Justin Hammer | Justin… | Show |
| Juston Seyfert | Juston Seyfert | Juston… | Show |
| Kala | Kala | Kala | Show |
| Kaluu | Kaluu | Kaluu | Show |
| Kamikaze | Kamikaze | Kamika… | Show |
| Kangaroo | Kangaroo | Kangar… | Show |