Bagged Then Tagged!
Following the pokémon contest, Ash and friends decide to take a break. While they rest, they decide to have a tag battle since Lyra and Khoury have to return to Johto soon. However, before that happens Team Rocket shows up and steals Pikachu and Piplup, putting their plans on hold.
Aired 15/10/2009EP 147 - Bagged Then Tagged!

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.