There's relief all around when Penfold's pilfering of Squawk's gadgets and clandestine late night trips to shady warehouses turns out to preparation for his taking part in 'bot battles' - a fight club for homemade robots. Penfold hopes to enter his own creation, Geoff, into the competition but is sidelined by an overeager Danger Mouse and his own robot, the CRN 3000! When the CRN 3000 obliterates all challengers, DM's call for a worthy opponent is answered by Megahurtz. But Megahurtz may have a secret android army agenda...