What would Pokemon's Professor Oak dream of? Having a complete Pokedex, perhaps? According to jaxamoto, he'd have slightly NSFW dreams of adventure with none other than terrible explorer Ash Ketchum.
Also, Oak would have an accent. Listen, it's a nightmare. Just go with it...stick till the end, too, there's one final joke in there.
Pokemon Paradox: Professor Oak's Nightmare [jaxamoto]