A Faux Oak Finish!
As the Twinleaf Town Festival continues, Ash and friends are surprised when they find that one of the upcoming Pokémon courses is to be hosted by none other than Professor Oak. Trouble starts brewing, however, when James brings back an old plan: to disguise himself as the professor.
Aired 20/08/2009EP 139 - A Faux Oak Finish!

2006
Pokémon the Series: Diamond and Pearl
After defeating Brandon and declining the offer to be a Frontier Brain, Ash sets off to travel through the far away land of Sinnoh. Once he gets there, he meets up with Hikari, a local trainer from the region, and they decide to travel together.