Ludwig "Kooky" von Koopa (born 1970) is one of the Koopalings and owns Ludwig's Thump Castle Hotel. He is the friend of Squidward Tentacles. He is the second-oldest son of Bowser and the heir to the Koopa throne, becoming the king of the Koopas upon the apparent death of his father in 2040. He was eventually assassinated by agents from Yoshi Island, causing the Koopa Kingdom to go into decline for a while. Morton Koopa, Jr. succeeded him.
- His namesake, Ludwig van Beethoven
- Squidward Tentacles
- Larry Koopa
- Lisa Simpson
- French fries