|Family:||Blue Oak (grandson), Daisy Oak (granddaughter)|
|Friends:||Elm, Birch, Rowan, Juniper|
|Class:||Professor, former Trainer, former Champion|
|First Appearance:||Chapter 002: VS Bulbasaur|
Professor Oak (Japanese: オーキド博士 Dr. Ōkido) is a support character in Pokemon Adventures. He has appeared in the Red, Green & Blue, Gold, Silver & Crystal, FireRed & LeafGreen, and Emerald arcs. He is the creator of the Pokedex and appears to act as the handler to the Pokédex owners.
Professor Oak is based off of an NPC of the exact same name, as such, he sports the same outfit. He wears a red, short-sleeved polo shirt, brown pants, black shoes, and a lab coat.
Red, Green, & Blue arc
Chapter 002: Vs Bulbasaur
Oak makes his debut as he enters his lab and a kid dressed in red is already there, rummaging through his stuff. He shouts at him calling him a thief. The surprised boy, as he tries to explain himself, accidentally releases all of the Pokémon in his lab. Oak then demands that the boy re-capture all of the Pokémon he let loose. Though he did as ordered, some of the Pokémon escaped the lab. The boy introduced himself as Red and Oak introduced himself back. Though still untrusting of Red, Oak followed him as they recaptured all the Pokémon eventually winding up in Viridian City. The last Pokémon they had to find was a Bulbasaur, that ran into the city's abandoned gym. They entered behind it. Oak tried to calm the Bulbasaur down only to get Tackled. Red tried to calm it down and with better results. Oak noticed how the Bulbasaur warmed up to him. Suddenly, he and Red were attacked by a wild Machoke. Oak then passed out. He awoke after Red and Bulbasaur defeated Machoke with Solarbeam. He asked how he knew about Solarbeam and Red replied that he just thought that plant (the bulb) would need sunlight. Oak then heard Red out about why he went to his lab. Oak then explained that he would need to find his own strength. He then gave Red a Pokédex and Bulbasaur then parted ways.
Between Chapter 002 and Chapter 003
Oak suggested that Red should head to the Viridan Forest. There, he could find many Pokémon and that a someone else should also be there. Later he contacted his grandson, Blue, and told him that he gave a second Pokédex to "another trainer."
Chapter 003: Vs Kangaskhan
Oak observed Red and Blue's encounter with a Kangaskhan and when they introduced themselves to each other.