The Rock Roader is an all-terrain buggy-like vehicle driven by Cole. It was originally built by Monkey Wretch on the The Dark Island for Clouse and the Sky Pirates, but was eventually commandeered by the Black Ninja. Cole later used it as his method of transport on the Day of the Departed.
On the Day of the Departed, Cole used the vehicle to drive through the desert, en-route to the Ninjago Museum of History alongside the Ultra Stealth Raider and Titanium Ninja Tumbler. On the way, Cole's ghostly arms began to fade away and he briefly lost control of the vehicle. Fortunately, he quickly regained control and continued on to the museum.
Cole left the vehicle outside of the museum before driving it to Yang's Temple, where he planned to settle his debt with Sensei Yang. Cole left the vehicle far below the floating temple during his confrontation. It was likely reclaimed afterwards.