From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
King Castle (キング キャッスル, Kingu Kyassuru; FUNimation "King Castle") is a large castle on Planet Earth.
King Castle was the home of King Furry. Piccolo Daimao took it over and proclaimed himself Planet Earth's new ruler during the King Piccolo Saga. Son Goku later fought and killed Piccolo Daimao in King Castle. The original King Castle was destroyed by Piccolo Daimao and an identical castle was built in its place.
Dragon Ball GT
The rebuilt King Castle was destroyed by Omega Shen Long.
King Castle was renamed Dāku Kyassuru (ダーク キャッスル, Dāku Kyassuru; Literally meaning "Dark Castle") while under Piccolo Daimao's control in Dragon Ball: Daimaō Fukkatsu. It was the final target destination of the video game and where Goku confronted Piccolo Daimao.
King Castle is the seventeenth level in Dragon Ball: Advanced Adventure. It was the final target destination of the video game and where Goku confronted Piccolo Daimao.
- Captain of the Guard (died here, later revived)
- Drum (died here)
- King Furry (died here twice, later revived)
- King's Guard (several members died here and were later revived)
- Piano (died here)
- Piccolo Daimao (died here)