| Ruler | Kingdom | Era |
|---|---|---|
| Mr. Leoric | 11 | |
| Mr. Leoric | 31 | |
| Mr. Leoric | 48 | |
| Mr. Leoric II | Dark Trio | 31 |
| Mr. Leoric III The Guardian | Dark Trio | 32 |
| Mr. Leoric IV The Conqueror | Dark Trio | 33 |
| Mr. leoric ix the hotdog muncher | Foundation | 37 |
| Mr. Leoric IX The Topaz Squigitas | Fate | 47 |
| Mr. Leoric V The Farmer | Astra per Aspera | 33 |
| Mr. Leoric VI The Mega Farmer | The Musketeers | 34 |
| Mr. Leoric VII The Lazy One | Heaven | 35 |
| Mr. Leoric VIII The Dumb | Fate | 46 |
| Mr. Leoric VIII The Inactive | Fusion Rejects | 36 |
| Mr. Leoric X The Monkey | Foundation | 38 |
| Mr. Leoric XI The Smurf | Foundation | 39 |
| Mr. Leoric XII The Sentinel | Foundation | 40 |
| Mr. Leoric XIII The Mcthick Shake | Foundation | 41 |
| Mr. Leoric XIV The Beast | Foundation | 42 |
| Mr. Leoric XV The Mzzterbator | Fate | 43 |
| Mr. Leoric XVI The Stupid | Fate | 44 |
| Mr. Leoric XVII The Almighty | Fate | 45 |
| Mr. Leoric XVIII The Undead One | Fate | 45 |
| Mr. Leoric XX The Show | Fate | 48 |