Gatchaman OVA (1994)

Ash, Pikachu, and their friends come to a desert city by the sea. Here they meet the Mythical Pokémon Hoopa, which has the ability to summon things—including people and Pokémon—through its magic rings. After a scary incident, they learn of a story about a brave hero who stopped the rampage of a terrifying Pokémon long ago. Now, the threat that has been bottled up for years is in danger of breaking loose again.

When the Ministry of Education goes back on its promise to keep Ooarai Girls Academy open, the task of saving the five-mile-long Academy Ship from the wreckers falls to Miho and her barely-seasoned tankery team. However, things go off track almost immediately. While the Oorai tank crew may have won the high school tournament, they’re now facing a larger and more experienced university team, and if they fail, their armored vehicles will be forfeit! Will they be swapping their tanks for the memories? It’s possible, but winning a tank battle is all about tactics and teamwork, and the fledgling Ooarai students have more friends and allies than anyone suspects.

When a plane crashes at sea, dolphins rescue a little boy and raise him as family. He lives a carefree life beneath the waves until an evil monster seizes power over the underwater world. Banished to dry land, the boy is taken in by a kind-hearted captain. With his new companion's help, the boy embarks on a journey to solve the mystery of his true identity.

Animals band together to save the day when the evil Otto Von Walrus hatches a sinister scheme to accelerate global warming and melt the Arctic Circle.

Tad accidentally unleashes an ancient spell, endangering the lives of his friends Mummy, Jeff, and Belzoni. With everyone against him and only helped by Sara, he sets off on an adventure to end the Curse of the Mummy.

In the distant technological future, civilization has reached its ultimate Net-based form. An "infection" in the past caused the automated systems to spiral out of order, resulting in a multi-leveled city structure that replicates itself infinitely in all directions. Now humanity has lost access to the city's controls, and is hunted down and purged by the defense system known as the Safeguard. In a tiny corner of the city, a little enclave known as the Electro-Fishers is facing eventual extinction, trapped between the threat of the Safeguard and dwindling food supplies. A girl named Zuru goes on a journey to find food for her village, only to inadvertently cause doom when an observation tower senses her and summons a Safeguard pack to eliminate the threat. With her companions dead and all escape routes blocked, the only thing that can save her now is the sudden arrival of Killy the Wanderer, on his quest for the Net Terminal Genes, the key to restoring order to the world.

Ryo Saeba works the streets of Tokyo as the City Hunter. He's a "sweeper" and with his sidekick Kaori Makimura, he keeps the city clean. People hire the City Hunter to solve their dangerous problems, which he does with a Colt Python. When Ryo's not working on a case, he's working on getting the ladies, and Kaori must keep him in check with her trusty 10 kg hammer.

The world's boldest buccaneers set sail for the great Pirate Festival, where the Straw Hats join a mad-dash race to find Gol D. Roger's treasure. There's just one little problem: An old member of Roger's crew has a sinister score to settle.

A group of five Genesect have invaded the big city and pose a threat to the supply of electricity, which attracts the attention of the legendary Pokémon Mewtwo. Satoshi, Pikachu and his friends must come to the rescue when the powerful leader, a red Genesect, faces Mewtwo.

When ancient dark magic falls into sinister hands and unleashes ages of suffering onto mankind, a group of heroes from different eras and cultures must band together in order to defeat it at all costs.