A goldfish sneaks away from home and floats off on the back of a jellyfish. After getting stuck in a glass jar, she drifts to the shore where she is freed by Sousuke, a five-year-old boy who lives with his mother Lisa in a house by the sea while his father Koichi works on a fishing boat. After healing a cut on Sousuke's finger by licking it, the goldfish is named Ponyo by her new friend.

Unknown to Sousuke, Ponyo already has a name and a family. Her father Fujimoto, a sorcerer who forsook his humanity to live underwater, searches frantically for his daughter Brunhilde. When found and captured, Ponyo rejects her birth name and declares that she wants to become a human. Using the power received from Sousuke's blood, she grows arms and legs and escapes to the surface once more. But the magic released into the ocean causes an imbalance in nature, causing the Moon to start falling out of orbit and the tides to grow dangerously stronger. Reunited with Ponyo, Sousuke must pass an ancient test to restore order in the world and let his companion live on as a human.

Ranma and the gang are invited to a boating trip with Kuno. Unfortunately, a storm destroys the yacht and everyone is stranded on a remote island. The whole situation goes even more awry when one by one, the girls disappear without a trace. Ranma then finds out that the girls are abducted by Toma, ruler of the island, as part of his personal harem.

Ichiro Mizusawa, a player from Rukawa's old junior high school, Tomigoaka, is diagnosed with a crippling leg condition and wants to play one last game with Rukawa. Hanamichi sets out to help the boy and fulfill his wish. 

(Source: ANN)

One night, the Tokyo National Institute of Microorganisms is attacked by a mysterious organization calling themselves the "Red Siamese Cats." The group causes the explosion of a high-security lab storing a virus—said to have a mortality rate of 80% with no known cure. This act of terror dominates the headlines, overshadowing the unveiling of the world's biggest airship developed under Jirokichi Suzuki. Peculiarly, the unveiling has a note attached for Kaito "Kaitou Kid" Kuroba, challenging him to steal the jewel on display—the illustrious Lady Sky.

Conan Edogawa is permitted to board the airship along with Kogorou Mouri, Ran Mouri, Sonoko Suzuki, Professor Agasa, and the Detective Boys. However, their fun comes to a halt when an unknown caller contacts Jirokichi and declares that they have released a certain virus in the smoking room. Soon after, symptoms begin to appear among the passengers and chaos ensues. Seizing the opportunity, the Red Siamese Cats suddenly appear and hijack the airship! 

To stop the assailants, Conan and Kaitou Kid, along with their allies, must work together to decipher the clues and discover the Red Siamese Cats' real objective before time runs out.

[Written by MAL Rewrite]