Red's Adventure (2) - Route 1
After the disastrous battle between him and blue, professor oak had come back in a rush. his "errand" that he had left to complete required he do work in the lab, and he was in a hurry.
The Human Species Ch. 81 - Royal Joker Blue
Drawing a card, red acquired possession of a professor oak. he hoped the deceased professor did not mind being used from beyond the grave to defeat his own grandson in a children's card game. "he goes back, opens the pokéball, and guess what?"
On the road again
After about 20 minutes, mark finally arrived in pallet town and then at professor oak's lab. he got out of the car and entered the building. "professor oak! it's mark! " he called for the pokemon expert but got no answer "hello?
Pokearth, Chapter 6
professor oak said. he handed me the plastic he was holding. my trainer card. "there. you can participate in everything as a normal trainer now. when you see nurse joy again, tell her that we're even." "why did you owe her anyway?"
The Stone Guardian
"yes, he was found in the kanto region by professor oak. when blue appeared professor oak took it upon himself to raise them both." "how old were they?" "they were about.... seven maybe eight?"
Lost Pokemon Episodes 18: seeking the last badge
The two trainers find them selves back at professor oak's lab to discuss matters. \<\<\< professor oak paces back and forth for a moment. "what you tell me is very disturbing. this thranos has the ability to corrupt pokémon?
The Journey Chapter 8: The Season Opening Ceremony
'i uh, used to work with professor oak before i started my journey.' he explained. pierce nodded, understanding. back on indigo plateau, ash was speaking again.
The Journey Chapter 9: Team Prime
'these guys tried to attack professor oak's lab and steal pokémon more than once when i was working there!' he answered. 'they're thieves!' on indigo plateau, jessie laughed. 'ah, it's good to be back on the action!' james nodded.
Chapter 2: First Timer Towards Pokedex.
'sorry though, i told everything to professor oak.' "and that is why i am here to ask both of you to bring your pokemon when you registered to be a trainer.
Lost Pokemon Episodes: EP 11 Psycho Visions.
professor oak greets hakuzo in an excited manner. "hello hakuzo. one of my... associates told me you obtained your third badge. as promised i'll give you a fire stone. stay right there."
The Other Side Ch 3
The pink haired woman brought her hand to her mouth before she continued, "you are going to want to find professor oak. he is the only person i can think of who might be able to give you some information on that emerald.
Greeting the Freedom Fighters (Ch.4 of Pokemon series)
There have been sightings at those places, but professor oak and blaine must be keeping them back. besides, there's word that there's another island not too far off of cinnabar that is completely void of life."