Imposter Professor Oak

Imposter Professor Oak was a character from the old Pokemon trading card game (I don't believe he ever actually appeared in the anime or video games); I always thought he had a neat design so I drew my own take on the mysterious creep.

The only Pokemon he was ever seen owning were a Gengar and a Koffing (two of my favorites, incidentally); I also tossed in a Ditto, because what else would an imposter own?