Paper Mario: The Thousand-Year Door Easter eggs

Jump Man
When you go back to the Glitz Pit after finishing Chapter 3, you need to make your way through all of the ranks for a second time. While you are making your way through the ranks, eventually when you are going into a Glitz Pit fight, you might see a fan say, "Jumpman! I mean, who?" This is referencing back to Mario's original name, Jump Man.