SpongeBob SquarePants Season 6, 7, 8, 9 full episodeswatch cartoons online.
SpongeBob SquarePants Synopsis: The character-driven toon chronicles the nautical and sometimes nonsensical adventures of SpongeBob, an incurably optimistic and earnest sea sponge, and his undersea friends. Dwelling a few fathoms beneath the tropical isle of Bikini Atoll in the sub-surface city of Bikini Bottom, SpongeBob lives in a two-story pineapple. Instead of taking the logical approach to everyday challenges, SpongeBob approaches life in a wayward and unconventional way. Whether searching for the ultimate spatula to perfect his burger flipping technique at the Krusty Krab, or just hanging out with his best friend Patrick (an amiable starfish), SpongeBob's good intentions and overzealous approach to life usually create chaos in his underwater world.
More information: IMDB, Wikipedia
P/S: Maybe we are missing some episodes and the number of episode is not exactly.
Related: SpongeBob SquarePants Season 10