Klösn is one of the few humans living on the planet Hösndösn. He only appears in the Club Nintendo comic "Super Mario: Verloren in der Zeit". Klösn wears a red suit and he is tall and slim. He appears as an intermediary between Hösn and Dösn and Mario by claiming that Mario has to take part in the "intergalactical Olympics" in order to get his Alarm Clock back from Hösn and Dösn. When it comes to the duel between Mario and Plok during the Olympics, Klösn is on the plumber's side. Like the other citizens of Hösndösn, Klösn replaces all instances of the letter "o" with "ö" when speaking.