Ludwig Von Koopa is the last of the Koopa Kids before you face off against Bowser himself. He’s the toughest of them all with all of the tactics from his siblings used at once. At this point in the game you should be used to those tactics though and should take him down handily.
As if you hadn’t guessed Ludwig is based on Ludwig Von Beethoven. Not only is the hair and furrowed brow carried over we would find out in Super Mario World that Ludwig is a composer as well. Despite their musical backgrounds both Ludwigs seem ready for a fight. Here’s a fantastic performance of Beethoven’s 5th.