Krang invents an age reversing serum that turns any creature into a younger version of itself. He decides to send Captain Kroolik and Grillox, a mutant circus performer from Dimension X, to track the Turtles down and squirt them. Shredder is also sent to go with the Captain. Once they have captured the Turtles, Captain Kroolik intends on putting them in his circus as performers and that will give Krang the opportunity to take over the city. The Turtles are tracked to a pizza place where Kroolik only gets a chance to squirt two of the Turtles' pizza with the serum. Michaelangelo and Leonardo eat those two pizzas turning them into little Turtles. Not knowing what the cause was for the shrinking, Donatello and Raphael take them and head back to the lair. On their way, they run into the Captain and Shredder who are waiting to capture them. The Turtles manage to escape and continue to the lair. Donatello and Raphael figure that Krang and Shredder are behind what happened to Michaelangelo an
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