Pokemon Best Wishes! - episode 49 - 21 Sep, 2011

Ash has returned to Nimbasa City and is excited to finally have his Gym Battle with Leader Elesa to earn his fourth Unova badge. However, he is next in line to Bianca, who also desires to challenge Elesa, but is forced to make a choice to continue her Pokémon journey or go home with her father... (Source: Wikipedia)