The Pokemon Company International has now added the Pokemon Advance anime saga to Hulu. This series of episode can be found under the mocker of Pokemon: Ruby and Sapphire.
Currently this series is only available to those with a Hulu Plus subscription. As of right now, only the first eight episodes of Pokemon Advance are on Hulu and only in English.
It is fitting that these episodes are now possible to watch seeing that Pokemon OmegaRuby and AlphaSapphire has recently been released. Pokemon Advance features Ash, Brock, May and Max traveling though Hoenn and is based on the Pokemon Ruby and Sapphire video games. The series was first aired in late 2003 on the KidsWB cartoon block.
If you have a Hulu Plus subscription then feel free to watch these Pokemon episodes!
Source: Fandom Post