| Ruler | Kingdom | Era |
|---|---|---|
| Sir Brain | Legacy | 24 |
| Mr. Brain | Blood Lust | 41 |
| Mr. Brain | 48 | |
| Mr. Brain | 48 | |
| Mr. Braindead | Amniot | 47 |
| Mr. Brainiac | Legacy | 33 |
| Mr. Brainiac | Superheroes | 35 |
| Mr. Brainiac | Black Star | 36 |
| Mr. Brainiac | 39 | |
| Mr. Brainiac | Heaven | 39 |
| Mr. Brainiac | Dynamite | 40 |
| Mr. Brainiac | Dynamite | 41 |
| Mr. Brainiac | 48 | |
| Mr. Brainiac | 48 | |
| Mr. Brainlund | Legend | 47 |
| Mr. Brainlund | Kingdom of Heaven | 48 |
| Mr. Brainy Smurf | Foundation | 39 |
| Mr. Brainz | Frenzies | 48 |
| Lady Bugs Eat Your Brains | Gladiators | 46 |
| Mr. Jello Brain | Insane Asylum | 41 |
| Mr. Magbrain | 48 | |
| Mr. Magbrain Mee | 48 | |
| Mr. Masterbrain | Relentless | 48 |
| Mr. Masterbrain II | 47 | |
| Mr. Nobrain | royal | 48 |
| Mr. Nobrain | royal | 48 |
| Mr. Nobrainsskillorsexiness | Valar | 47 |
| Sir Scatterbrain | 12 | |
| Mr. Scatterbrain | 12 | |
| Mr. Sharpforbrains | 48 | |
| Mr. Sharpforbrains | 48 | |
| Mr. Sharpforbrains | 48 | |