|Age:||Ultra equivalent of an Elementary School Student|
|Home world:||Land of Light|
|Voice actor(s):||Fukui Miki|
|Suit actor(s):||Fusayo Takatsu|
|First Appearance:||Ultraman Boy's Colisium|
|Last Appearance:||Mega Monster Battle: Ultra Galaxy Legends The Movie|
|Number of Appearances:||TBA|
ULTRAMAN BOY'S ULTRA COLISEUM (ウルトラマンボーイのウルころ) worked as a way to introduce younger children to Tsuburaya Productions' heroes and monsters. Hosted by Ultraman Boy, a new invention, each 5 minute-long episode provided info on the different Ultra Heroes, monsters, and robots, plus, featured "new" battles by combining stock footage from the various series.
- Height: 24 m and growing
- Weight: 6,000 t and growing
- Age: Ultra equivalent of an Elementary School Student
- Home world: Land of Light, Nebula M78
- Flight speed: Unknown, not seen flying
- Favorite subject: Ultra Science
- Dislike subject: Physical Education
- Likes: The Ultra Heroes, Yullian (Crush)
- Goals: To become a member of the Space Garrison (Called a Space Ranger), learn how to fly.
Ultraman Boy has three brief cameos in this movie. He is first seen fighting and losing to a rookie Ultrawoman while training in the Ultra Coliseum. Later, when Ultraman Belial attacks the Land of Light Ultraman Boy can seen hiding and shouting in fear "Oh! This is terrible!", he was presumably frozen along with every other Ultra (excluding Ultraman Mebius, Ultraman Leo, Ultraman Astra, and Ultraman King) when Ultraman Belial stole the Plasma Spark. during the film's resolution, he is seen standing between Ultraseven 21 and Ultraman Neos listening to Ultraman King's speech.
- The original Ultraman Boy suit was reused for his appearance in this film.
- There is a theory stating that the spheres on his boots are part of the reason he can't fly, but this seems to be completely false.
Ultraman Boy reappeared in the new puzzle role-playing game for mobile devices, Ultraman Galaxy. He is a C ranked card, which means he is quite common.
- Ultraman Boy, besides being the youngest Ultra known (until the appearance of an Ultra Baby in Mega Monster Battle) is the only Ultra known to not be able to fly due to his age.