Perry the Platypus stop the destrustion of all of the lawn gnomes in the  " Lawn Gnome Beach Party of Terror" episode of which animated television series
Lawn Gnome Beach Party of Terror: "Lawn Gnome Beach Party of Terror" is the second broadcast episode of the animated television series "Phineas and Ferb." Lawn Gnome Beach Party of Terror:  Meanwhile, the boys' pet platypus, Perry, successfully halts the destruction of all the lawn gnomes in the tri-state area by his nemesis, Dr. Heinz Doofenshmirtz.
i don't know