Professor Oak is an old man who appears in Super Pokeman 64 bloopers: WELCOME TO POKEMANS! and Super pokeman 64 bloopers: GYMS AND BADGES. He is a professor who welcomes Mario to the world of Pokemans. He often forgets his own grandson's name, because as said before, he is old.
In super pokeman 64 bloopers: WELCOME TO POKEMANS! He appeared in Mario's room and asked Mario if he was a boy or girl.