As Aidan returns to pallet town, Prof. Oak asks Aidan to fill the pokedex. He lies and says yes but instead he runs away and claims he will defeat the elite 4.
Aidan's Special Adventure! P.S: w/ Pikachu: Do I gotta catch em all?
As Aidan Gives Prof. Oak the GS ball, He asks him to fill the pokedex but instead Aidan decides to become a pokemon master.