As the final showdown commenced at the club, Leo and Raph were fending off Rahzar and Tokka's snapping attacks. Dr. Perry informed Donatello that carbon dioxide was essential to the demutation process and their repeated burping was slowing down what little anti-mutagen they had ingested. To speed the process back up, the Turtles knocked their foes off their feet and flat on their backs with a couple of barrels they found somewhere in the concert, and then the turtles shoved fire extinguishers into the creatures' mouths, which administered the needed carbon dioxide to reverse the mutation. Finally, the antidote took effect and the two mutants returned to their normal animal forms. What happened to them after this is unknown, though it is most likely that they could've been sent back to the Bronx Zoo.