Po has a problem: something is effecting his heart, almost like it's getting beaten up! Sandy, the furious 5, Spongebob, Patick, and Icky get inside a shrinking submarine to face the problem: Lukinion. after Lukinion was defeated, he shrunk into small size which the louge thought he was dying, and secretly infested Po, and hidaway in his body until Lukin was strong enough to destroy all the lougers from the inside, starting with Po! can he be stopped again?

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