Pokémon - A stealthy challenge!

Seizoen: 16 - Aflevering: 52 / 876 - Eerst uitgezonden: 11 december 2014 - Episode ID: 1067247

Ash and the others meet up with Sanpei and his Greninja who comes to them for help in dealing with another Ninja Trainer. They help Sanpei out, but something happens to Ash's Froakie.