Ultraman Zearth (ウルトラマンゼアス Urutoraman Zeasu?) is a fictional character from the Ultra Series of tokusatsu and the name of a 1996 movie in the series.
Ultraman Zearth is a parody Ultraman. He hails from The Land of Pikari in Nebula Z95. He has a big red face and dislikes dirt, and will go to great lengths to wash it off his hands. His goal is to clean the polluted Earth. He transforms with an electric toothbrush, which is consistent with his hygiene fixation. He's not quite adept at being a superhero, but at least he tries his best.
His human form is Katsuto Asahi who also dislikes dirt like Zearth.
Zearth's first movie, Ultraman Zearth, was released in 1996 to celebrate the 30th anniversary of the original Ultraman, as part of the Ultraman Wonderful World (along with Revive! Ultraman and Ultraman Company). Zearth's movie appearances include Ultraman Zearth (9 March 1996) and Ultraman Zearth 2: Superman Big Battle - Light and Shadow (ウルトラマンゼアス2 超人大戦・光と影 Urutoraman Zeasu Tsū: Chōjin Taisen Hikari to Kage?) (4 December 1997). Ultraman Zearth 2 is paired with the first Ultra Nyan short.
The movies include cameos by most of the original Science Patrol from Ultraman. Arashi is a helicopter reporter (which is not too far from what he currently does in real life). In Ultraman Zearth, Hayata is a night watchman (who holds his flashlight up like a Beta Capsule) and in Ultraman Zearth 2 he is a common citizen who tries to transform into Ultraman with a spoon (echoing Hayata's performance from episode 34), Fuji (the only woman who ever catches the MYDO plane taking off from a secret base exit, which happens to be a billboard), Ide (as a photographer), and Captain Muramatsu, as a fisherman. In Ultraman Zearth 2, Ide shows up as the fisherman's son with the a photograph of his dad (actor Akiji Kobayashi, who played Captain Muramatsu, died between films). And finally, in Ultraman Zearth 2, we are treated to a rare cameo reappearance of Jiro Dan, none other than Hideki Go from Ultraman Jack as a telecast reporter on TV.