The entrance to Rivet Ravine.
Secret areasFossil Rocks. Pay-To-Dig is in Tunnel 1 (4000G for each visit).
Note: An asterisk (*) indicates a Vivosaur that is rare.
Bonus Area 1
Bonus Area 1 can be accessed after reaching Fighter Level 5.
Bonus Area 2
An asterisk (*) indicates a Vivosaur that is rare.
Tunnel 5 can be accessed after fixing McJunker's broken mine cart.
The Rivet Ravine Pay-to-Dig Site can be accessed after reaching Fighter Level 7.
The Moles' Secret Tunnels can be accessed after becoming a Master Fighter.
In the tunnels, you meet McJunker. He explains that his mine car, which leads to new fossils, has been trashed. You must go after his pliers and his wrench, using your upgraded sonar. However, BB soldiers appear whenever you dig one up. Once the tools are found, MCJunker requires you to clean his rusted tools. After successfully cleaning them he will ask you to go to Holt in the Junk Depot. Use a V-Raptor to defeat him and obtain the electrominite. Bring it back to McJunker, who fixes the car. In Tunnel 5, though, the BB Bandits are waiting. Battle Snivels and Rex in a row to beat the chapter and obtain the second tacky idol .