Misha is a character of the day who appeared in Purrloin: Sweet or Sneaky? (BW044).
Misha first approached Cilan and asked if he had seen her lost Purrloin. He then led her to the cave Purrloin had taken Ash, Iris, and Meowth to. When Misha reunited with Purrloin inside a cave, he appeared to have some animosity towards her. It was because she did not return home and therefore he believed she had abandoned him. She tried to explain to Purrloin that the only reason she didn't return home was because she had broken her arm while she was out. Still, Purrloin didn't believe her.
Even though she was injured herself, Misha attempted to help Cilan rescue Ash, Iris, Meowth, and the other Pokémon from the sand pit. However, the bridge she and Cilan were standing on broke and they fell into the trap themselves. Purrloin wanted to help rescue her but she told him to find help instead. A while later, she and the others are rescued by the flock of Tranquill Purrloin had stolen from earlier who he begged forgiveness from.
Once Misha was rescued, she thanked Purrloin for going back to the Tranquill in order to save her. Seeing how infatuated both Meowth and Oshawott were with Purrloin, she revealed to them that he was actually male and not female as they believed. This, of course, left Meowth and Oshawott disappointed.
(Source: Bulbapedia)
