He is in the same grade as Wolfgang, although he's spent the last couple of years in juvenile hall (before which he "owned" the vacant lot). He and Wolfgang went from being enemies to friends, united in their efforts to share the lot together and keep all the fourth graders out. However, Ludwig never reappeared after his debut episode, possibly meaning that he went back to juvenile hall.
He is voiced by Phillip Van Dyke, who voiced Arnold in Season 2 and Season 3. He was created after Phillip lost his "Arnold" voice, just like what happened with Wolfgang's voice actor Toran Caudell before.
- He's named after composer Ludwig van Beethoven, given that Wolfgang shares the same first name as the composer Wolfgang Amadeus Mozart.
- See Ludwig/Gallery
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