Try for the Family Stone!
Still on the way to Sunyshore City so Ash can battle for his final Sinnoh Gym Badge, Ash and friends meet a female trainer and her Misdreavus who are battling a Murkrow for a Dusk Stone, which has the power to evolve Misdreavus into Mismagius. It also has the power to evolve Murkrow into Honchkrow, so she is frantic to get the stone.
Aired 22/10/2009EP 148 - Try for the Family Stone!
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.