The tunnel entrance to King Plasto's headquarters. King Plasto's headquarters was the headquarters of the supervillain known as King Plasto. It was accessible from a tunnel in Haunted Hills Forest. Locations FRERP Arena FRERP control room Entrance Control Plasto's Storage Room References ↑ As seen in The Fantastic FRERPs. Retrieved from "https://superfriends.fandom.com/wiki/King_Plasto%27s_headquarters?oldid=42763" Categories: Locations Hidden Lairs Caves Community content is available under CC-BY-SA unless otherwise noted.