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Charles is the one who warns SpongeBob about the Bikini Bottom Triangle, and he explains that when a mysterious fog rolls and mermaids are heard singing, anyone in the fog will be vacuumed to the Triangle. While SpongeBob, Patrick, Squidward, and Mr. Krabs are trapped in the Bikini Bottom Triangle, he is the one who makes all of the Krabby Patties for the customers. He also catches Plankton.