Dark Nebula Castle

is the base of the evil Dark Nebula Organization.

This castle is where Kyoya Tategami would train to defeat Gingka Hagane. After losing to him a second time Doji arrives and invites Gingka and his friends to the Dark Nebula Castle, where he awaits them. They are stalled by Defenses put up by Doji so Gingka and co. cannot enter the castle. Gingka and co. and Doji are surprised at the site that Kyoya has arrived in order to help them. Gingka and co. manage to break through by combining there special moves. Doji and his A.I system Merci have prepared a plan to stop them, but they still succeed in passing by all of Doji's tasks and challenges such as beating a gaint Beyblade and taking down Dan Sodo and Reiki Sodo. Gingka then locates Doji and challenges him to a beybattle for revenge for his father. Doji accepts the challenge in order to stall for time. Doji's plan succeeds as his battle awakens Ryuga and Lightning L-Drago. Ryuga crushes Gingka which causes him to retreat.

Landmarks
The castle is generally in dark clouds. There's a stadium in between 2 towers.

Trivia

 * There is a stadium hidden beneath the sea around the castle. This is where Gingka first felt the wrath of Ryuga and Lightning L-Drago 100HF.
 * There are many traps inside the castle controlled by the AI Merci.
 * What happen to that castle after Dark Nebula has been disbanded is unknown. It was likely abandoned for good.