Kyutai Panic Adventure!

"Kyutai Panic Adventure!" is a special crossover story featuring characters from One Piece, Dragon Ball, and Astro Boy. It was created as part of many interactive crossovers screened at special events called Odaiba Boken-Oh to commemorate Fuji TV's 45th anniversary. It has yet to see a home release. In the following year, it had a sequel called Kyutai Panic Adventure Returns!.

Short Summary
Frieza attacks Fuji TV's orb section, throws it at the ocean, and eventually engages in a fight against Son Goku. The Straw Hat Pirates arrive to help, but end up having a cannonball battle against the Arlong Pirates. Astro Boy, witnessing the situation, rushes to the place and lifts the orb back at its place.

Long Summary
The film starts with Bulma, Roshi, and Oolong flying over Tokyo in a hovercar. The music changes to be suspenseful as Frieza comes into view. He lands on the orb section of Fuji TV's headquarters before hovering in the air and charging a beam to separate it from the rest of the building. Goku flies in to try to stop him, but he, Krillin, and Gohan are too late. The three rush to catch the orb and carry it through the air away from Frieza. They fly over people sitting at outdoor tables, who run away in fear. Frieza charges another beam and hits them. A weakened Goku pants heavily and lose strength, and the three slowly fall into the sea, still trying to carry the orb.

Goku goes above water and activates his Super Saiyan form. He engages in combat with Frieza, and Krillen and Gohan leave the floating orb to search for him. They see him fighting Frieza, but suddenly, the Going Merry arrives. All of the Straw Hat Pirates are shown. Luffy climbs onto the [whatever the head of the ship is called] and reached to grab the orb. However, they take cannon fire from an unknown foe. The camera pans to show Arlong Park, where Arlong, Hatchan, Chew, Kuroobi, and Momoo are. Arlong fires a cannon at them, but Luffy deflects the cannonball with Gomu Gomu no Balloon.

As the two groups exchange fire, Astro Boy and his companions watch from their base. Astro Boy activates his leg rockets and flies through the air. He dodges Arlong's cannonballs and dives in the water beneath the orb. Uran and Professor Ochanomizu cheer him on as he lifts it out of the sea. He flies it over other attractions in the area back to the Fuji TV building. He lowers it into place and reattaches it. Uran and Ochanomizu celebrate, and Astro Boy, Goku and his friends, and the Straw Hat Pirates say their farewell to the show's viewers.