Pokémon: Pikachu's Rescue Adventure is a special anime that premiered in summer 1999, produced by OLM.

About the production: the story comes from a video game, there is 1 episode of about 23 minutes and its current status is "finished".

Its main genres are adventure, comedy and fantasy, with themes such as Kids, Animals, Primarily Animal Cast and No Dialogue.

On AniList, Pokémon: Pikachu's Rescue Adventure has an average score of 63%, an average score, and appears on 6,264 users' lists.

While most of the smaller Pokémon are taking a nap, Togepi suddenly wakes up and, after seeing a group of flying Pokémon, finds itself separated from the rest of the Pokémon. Noticing this, Pikachu, Bulbasaur, Squirtle, Venonat, Marill, and Psyduck go in search of Togepi. It is there that they meet Elekid, who leads them to a group of Exeggcute. However, one such Exeggcute has a missing egg, and believes Togepi to be their missing part. Thus, the gang must travel to find the missing egg, and endure a storm that could blow Togepi and the Exeggcute away. (Source: Anime News Network)

Official synopsis from AniList.