King Leonus was the monarch of the Kingdom of Leonus (located in Efrika) in 3237. Because the section of Mobius his kingdom was in was not of interest to Dr. Eggman, King Leonus was unwilling to join the Kingdom of Knothole's coalition against the Eggman Empire. Due to Patch secretly poisoning King Max, the negotiations were cut short and he was brought back to Knothole Village for treatment. (StH: #155)
- While he was never seen, it is assumed King Leonus was a Mobian as Mobian settlements throughout Mobius were almost always kingdoms, while Overlanders/Humans had cities or city-states.
- Judging by his name, it is also possible that Leonus was intended to be a lion.