PJ Masks Season 2 Episode 12 Race up Mystery Mountain - The Mountain Prisoner >The kids are in the museum looking for books about mountain legends until they noticed that the bookshelf is ransacked. At night, Night Ninja and the ninjalinos were reading the books they stole and the PJ Masks goes after them. However, while they're away, the ninjalinos kidnapped PJ Robot and take him back to Mystery Mountain with the PJ Masks in pursuance. When they arrived, Night Ninja tells the PJ Masks to get the ring from the peak Pagoda in exchange for PJ Robot who's being held defendant in their cell which might not be obvious for the heroes due to the Pagoda filled with traps.