| Ruler | Kingdom | Era |
|---|---|---|
| Mr. Joran Killjoy | 48 | |
| Mr. Joran Killjoy I | 48 | |
| Mr. Joy | 48 | |
| Mr. Joyce | 48 | |
| Ms. Joyce The Watcher | Army of Anubis | 47 |
| Ms. Joycecu | 48 | |
| Mr. Joyheel | 48 | |
| Mr. Joyihbcd | 48 | |
| Mr. Joyless | 48 | |
| Mr. Joyless | Lost Souls | 48 |
| Mr. Kiljoy | 36 | |
| Lord Kiljoy | Kiljoys return | 47 |
| Lord Kiljoy | The Death Dealers | 47 |
| Lord Kiljoy Returns | 48 | |
| Mr. Killjoy | 37 | |
| Mr. Killjoy | 37 | |
| Mr. Killjoy | Bringers of Death | 37 |
| Mr. Killjoy | 47 | |
| Mr. Killjoy | 48 | |
| Mr. Killjoy | 48 | |
| Mr. Killjoy | 48 | |
| Mr. Killjoy | 48 | |
| Mr. Killjoy | 48 | |