Instructions
Play through the main storyline of "Yu-Gi-Oh! 5D's Wheelie Breakers" and select the "Bronze Cup" tournament after you complete both story modes.
Win both the "Bronze" and "Silver" cups and compete in the "Gold" cup. Win the "Gold" cup tournament with any deck you choose.
Go to the card shop in "Yu-Gi-Oh! 5D's Wheelie Breakers" and purchase the Red Dragon Archfiend card from the shop. It will only be on sale if you win the Gold Cup.