Ureme 1

Ureme is series of Korean children's science-fiction films created by Kim Cheong-gi and originally starring Shim Hyung-rae as the titular hero. The series began in 1986 and released 6 films by 1989. The sixth Ureme film starred Han Jeong-ho as the lead role, but Shim Hyung-Rae would return to star in Ureme 7, which was directed by Lim Jong-ho but written and produced by Kim Cheong-gi.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.