Professor Oak (anime)/History/Advanced Generation series

Professor Oak made a few appearances during the Advanced Generation as well and was in a few episodes of the Weekly Pokémon Broadcasting Station's side story episodes.

In Gonna Rule the School, he was lecturing the students of 's Pokémon Trainers' School via satellite. Oak traveled to Hoenn in A Six Pack Attack! to meet with his friend, Professor Birch and brought along the Kanto starters as they interacted with the Hoenn starters.

In The Right Place and The Right Mime, Professor Oak noticed that one of his felt most comfortable being with. That was when he suggested that May keep the Squirtle and raise it into a strong Pokémon. He also said he would watch after her.

In The Unbeatable Lightness of Seeing!, when Ash was still recovering from his defeat at the Battle Pyramid, Professor Oak brought him a special package meant to cheer him up, containing a poster with the prints of, a fishing lure from , and food from. He also handed Ash a postcard from and told him that his grandson was doing research in the Sinnoh region and that many  cannot be found anywhere else. Later, he was asked to judge the impromptu Contest Battle between May and Drew. Along with Scott, he judged their battle, which ended in a victory for Drew after his and  knocked out May's Combusken and.