Spongebob sea urchin. In "The Incredible Shrinking Sponge". An imprisoned Plankton teams up with his fellow inmates to break out of jail and steal russia magadan Krabby Patty secret formula. They also have mouths and seem to talk in their own language. Top Kids Shows See All. In most episodes, they appear as round, purplish-black animals with black spikes. Top Cat, The Complete Series. After failing again to steal the Krabby Patty formula, Plankton gets a pet to cheer himself up. Top Cat, The Complete Series. SpongeBob SquarePants, Season SpongeBob SquarePants, Season 7. While trying to order a special sandwich, Patrick gets swept up in the fast paced world of business. View in iTunes.