King
Overview
When the Wright family moves into their new home, Russel is surprised to find a secret passage under his bed. This passage leads him and his dog Gus to the world of Under, where he discovers he is the new King and that Gus can talk! Russel and Gus quickly befriend the people and creatures of this mysterious land. Bob Wire and his evil team are continually conspiring to steal Russel's crown and become all-powerful rulers of the land.
King at a glance
King is a 2003 animation and sci-fi & fantasy TV series, starring Mark Rendall, Cal Dodd and Kevin McDonald. It has 3 seasons and 53 episodes. TMDB users rate it 5.7 out of 10 from 6 votes.
You can watch King free on Tubi TV. If you enjoy it, try Pokémon, Mona the Vampire and Dungeons & Dragons next.