Brady and Boomer's evil cousin who was heir to the throne until Boomer and Brady showed up. He is the main and inept antagonist of the series. He usually spends his time trying to think of ways to get rid of Brady and Boomer and attempts to cause them trouble. He even attempted to have them both killed during the first episode so he can inherit the crown. His best friend is Yamakoshi, a talking fish who advises on how best to foil the kings. He fell in love with the mermaid Amazonia in the episode "A Mermaid's Tail" even asking her to marry him. Surprisingly, neither Boomer nor Brady is aware of Lanny's evil intentions, thinking of him as either a minor pest or sometimes a friend, which aggravates Lanny even more.