Gulliver's Travels Beyond the Moon

The story concerns a homeless boy named Ted. After seeing a movie about Gulliver he meets Professor Gulliver himself in a forest. Gulliver is now an elderly, space-traveling scientist. With Dr. Gulliver's assistant Crow, and Ted's companions, a talking dog and a toy soldier, they travel the Milky Way to the Planet of Blue Hope, which has been taken over by the Queen of Purple Planet and her evil group of robots. Armed with water-pistols and water balloons, which melt the villains, Ricky and Gulliver restore Blue Hope to its doll-like owners.

Official website :https://lineup.toei-anim.co.jp/en/movie/movie_gulliver/