Jerry the Platypus was the first doppleganger that Heinz Doofenshmirtz made to destroy Perry the Platypus. Doofenshmirtz claims that he was so cute that he couldn't bear to destroy him. Jerry likes whacking things with his metal rod, including himself and Doofenshmirtz. Jerry is the only doppleganger to NOT fight when Perry arrives. When the fight begins, he and Doofenshmirtz just sit back and watch. He first appeared in Cheer Up Candace.