Crashing deep into the core of the planet Mars, Mars “Digger”™ tunnels his way through secret hideaways on his Rubble Rover, ready to dig, chip, smash and blast any rock or enemy in his path. His trusty excavation vehicle with the super force of its projectile launcher keeps enemies at bay while battles rage. When the Planet Heroes™ need to blast into a fortress that’s locked, Mars “Digger” makes sure the place gets rocked!