Episode 191
Back in Twinleaf Town, Ash, Dawn, and Brock finally come to realize that their journey together is over. Everyone is sad about this, especially Piplup who is overwhelmed with tears. However, as one journey ends, one is also set to begin.
Aired 09/09/2010EP 191 - Episode 191

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.