No, I mean the method I created which contained the blank character block named "N." It's on page one.
1) Drive to N.Oxide's boss garage.
2) Engage in the battle.
3) When the epilogue begins, wait for Oxide's description.
4) Press Start, and cancel the epilogue.
5) You and Oxide are at the victory square.
6) Hold L1+R1 and press X, Down, Circle, Triangle, Down, Up, Left.
7) Almost immediately Oxide will turn into a giant wumpa fruit(lol)
8) Press the X button as you normally would.
9) The game is slightly glitched. You are in The Lost Ruins, but when you enter a tunnel it shows your character entering Oxide's boss garage.
10) After the loading, you are in Papu Pyramid with Oxide. The caption reads, "Papu Papu's Final Challenge".
11) Quit the race, and check your character menu for a surprise.
If you see me posting, it's because I've been asked to. Which I guess would mean I'm taking requests.