Dinosaur King: Fierce Battle! Zanjark!

Apparently, Alpha gang had actually gave up, of course, they still battle against you, but no more activities that trigger the stone slab. But then, a new enemy appears, Zanjark, space pirates who, using dinosaurs, want's power on the universe, and now, D-team has to stop them, battling trough ancient rome, and a zanjark base. More details are unknown since this is the only arcade version which wasn't preserved for emulation.