Johnny hangs out with his gang in Lab 32 in 2300 A.D. in Chrono Trigger. He is often referred to as "Johnny the Man" by his robot gang of Proto 2s. Johnny is a creature that's part robot. His mechanical parts transform into a road-type vehicle complete with nitros.
When Crono and his party arrive in Lab 32, Johnny challenges them to a race. Using the Jet Bike, Crono races him along the highway through the ruins and beats him. Having reached the other end of Lab 32, Crono and his party continue on their journey.
On their way to the Sewer Access, Crono's party passes through Lab 32 and races Johnny along the way.