Purrloin was Misha's Pokémon and were very close. However, Misha went one day and never came back. Purrloin went into the wilds to find some food and met the heroes, whose Meowth and Oshawott fell in love with Purrloin. Seeing Ash's bag containing the berries, Purrloin tricked them into going into the mine, so he could take the bag with the berries. Misha came and explained to Purrloin that she was injured on her way and had to be healed in hopsital. Cilan and Misha went to save Ash, Iris and their Pokémon, but were trapped as well. Purrloin managed to persuade a flock of Tranquill to save Misha and the others. Soon, they were saved and Purrloin started trusting Misha again, while he then snickered after seeing Meowth and Oshawott's love-confession to him.
None of Purrloin's moves are known.