A Challenger Approaches is a side quest available in Fossil Fighters: Champions. The side quest can only be accomplished after defeating Zongazonga for the first time. To complete the quest, the player must defeat all of his/her past friends and enemies in Fossil Battles. This includes:
5. Prof. Scatterly (Caliosteo Museum) (Note: You do not battle Scatterly, but instead you battle Zongazonga in a flashback)
After beating the above characters, the player must go back to Cranial, and talk to Joe Wildwest in his suite. He will challenge the player to a Fossil Battle. If the player beats Joe Wildwest, the challenge will be completed.