There's this cartoon show and in one episode they get trapped in a game show. The host is some weird alien that stands on a floating disk. The only way out is if they win the show.
As this question's asker's account was deleted so they will not self-answer, I am taking the answer they said that they found and turning it into a answer.
This is "The Feud!", episode 54 of Voltron: Legendary Defender, and the 4th episode of season seven. It was released on August 10, 2018.
A brief summary that matches the question:
The Paladins find themselves on a bizarre game show called "Garfle Warfle Snick!" hosted by an alien called Bob. They have to amass enough points to win their freedom.
Bob, the host, sits on a sort of disc-like floating thing.