Castle Dedede, sometimes referred to as Dedede's Castle, is a recurring location in the Kirby series. In all games, this castle serves as King Dedede's home and sometimes the last level. It is apparent that Dedede has multiple castles.
Kirby 64: The Crystal Shards: located in or near a forest. Compared to other castles, this fort is relatively small and cozy, lasting only one level.
Kirby: Squeak Squad: located on a cliff in Prism Plains. This castle resembles its counterpart in Kirby: Right Back at Ya!. In fact, there is a device in King Dedede's room that resembles the teleporter in the anime, where King Dedede receives monsters from Nightmare Enterprises. After the initial confrontation with Dedede, if Kirby returns to Prism Plains, it can be seen that the castle's main chamber and roof had collapsed. Either the Squeaks broke it during their break-in or Dedede threw Kirby into them with such force that it caved in the roof.
Kirby's Epic Yarn: located on a hill somewhere in Dream Land. When Yin-Yarn took over Dream Land, it became a floating stronghold. It looks like the castle from Kirby: Right Back at Ya!, and is known as "Castle Dedede" accordingly.
Kirby Mass Attack: located on an island in the middle of Dedede Resort. It's made up of four walls, four towers, and a giant dome in the middle. The interior is made of sweets.
Kirby: Planet Robobot: the same castle seen in Kirby: Triple Deluxe, though this rendition is much larger and pays homage to the medieval era. Nevertheless, it is effortlessly destroyed by the Access Ark's defense sentries in the game's opening and is not seen again until the game's end as a pile of rubble.
King Dedede has many castles throughout the Kirby games, though he only seems to have one in Kirby: Right Back at Ya!.
The castle is made of yellow bricks on the outside, with the towers having red tops. It has a fountain and courtyard in its outside. The inside of the castle has green bricks in its walls throughout the hallways. The castle consists of Dedede's throne room, which has a monster transmitter that is linked to the one in the command center of Nightmare's Fortress, as well as Tiff and Tuff's family's living room, Meta Knight's living room, the dining hall, the castle kitchen, the bathrooms, Dedede's bedroom and balcony, Escargoon's bedroom, the library, and even the dungeon, where the Channel DDD studio is located. Various statues of Dedede himself, as well as his faceprints, can be seen throughout the castle. One of the castle's towers also has an observatory in it.
Dedede's Castle appears in the distance in Kirby and the Rainbow Curse's introduction.