Yu-Gi-Oh! 5D's episode 67: "Lessons Learned"
The Chancellor is the head of the New Domino City Duel Academy. He wasn't able to persuade Rudolph Heitmann, so with Zora's reference, he comes to Yusei Fudo to ask him for his help by tricking him that there is a frightening machine named "Heitmann" that needs to be fixed in the Duel Academy. After Yusei defeated Heitmann, he apologizes to Yusei for tricking him. In the dub, he further says that the only reason he didn't fire Heitmann was because one of the Academy's top contributors was Heitmann's mother (whom he still lives with).