Pokemon Season 12 - Episode 584 – Stopped in the Name of Love!

Dawn's Piplup starts to show signs of evolution, but as soon as Piplup began to evolve, it stopped itself by using Bide and then collapsing afterwards. Barry and Kenny showed up and told Dawn all about how great it will be when Piplup evolves. Dawn found Piplup and it began to evolve but stopped itself again. Piplup told Dawn it doesn't want to evolve and ran off. After being attacked by Team Rocket, Dawn decided not to evolve Piplup and Nurse Joy gave Dawn an Everstone to prevent Piplup from evolving.