Sticking With Who You Know!
On the way to Sunyshore City, Ash and friends stop in a forest. Things start to get chaotic, however, as Pikachu gets upset with Piplup in a debate over which of them Ash likes best. However, a mysterious wave all of a sudden makes the two Pokémon inseparable, so Ash and the others must solve the problem.
Aired 29/10/2009EP 149 - Sticking With Who You Know!
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.