From Bulbapedia, the community-driven Pokémon encyclopedia.
- If you were looking for the game mechanic introduced in Generation V, see seasons.
A season of the Pokémon anime is a collection of dubbed episodes that air for the first time between September and June (Seasons 1-9), between April or May through the following spring (Seasons 10-13) or in February (Seasons 14-present). They usually share an opening, and are often 52 or fewer episodes long. There is no distinction between these dubbed seasons in the original Japanese airings, except when the seasons' beginnings and endings coincide with those of a new series in Japan. Each season also has a movie that corresponds to it, though the pairing of a movie with a specific anime season is merely due to the annual release they undergo in Japan.
It should be noted that the concept of seasons does not exist in Japan, where episodes of Pokémon air nearly every Thursday. An invention of the American broadcast industry, a season is typically aired new for nine months out of the year, with three months (usually during the summer) taken off to begin production for the next season, during which reruns air. The Japanese release schedule was eventually adopted by Pokémon USA (now known as The Pokémon Company International) after 4Kids Entertainment lost dubbing rights, likely due to the issues that resulted from the series's summer gaps, such as the Advanced Generation series not beginning in earnest until more than half a year after the games had been released.
List of seasons