After stealing his groceries again, the wild Litten comes to Ash for help when its friend Stoutland starts to have trouble breathing. Ash struggles to get it to the Pokémon Center...but Stoutland is old, and there’s not much Nurse Joy can do.

Ash watches over Litten as it mourns for its dear friend, and even Meowth offers a compassionate ear. In time, a beautiful rainbow helps revive the joyful memories, and Litten begins to feel better. Ash invites Litten to join his team to continue the training it started with Stoutland—and after a battle, Litten agrees. The memories are still fresh, but Litten has a new life ahead!