This article or section presents information pertaining to One Pikmin, a fanon game created by Piki1.
Gestahlborb Castle is the first main dungeon encountered in One Pikmin. It is filled with many tricks and traps and is the location of the first seed key. It is also the home of the tyrant Gestahlborb.
The Castle is a tall, four-floor castle that looks like a Roman castle. It has many windows and red carpets. Much Guard Borb armor and weapons hang in its halls. The kitchen has many open fire pits and wooden cupboards filled with food. Near the top is a giant statue of Gestahlborb. The throne room is large and has a long red carpet that leads to the giant throne. On the top of the throne is the seed key. Underneath the throne is a long underground passage that leads to the main shopping square in Gestahlborb City.