Spongebob's Last Stand is an Earth Day themed episode of the animated series.
Plot[]
Early one day, SpongeBob and Patrick become the first visitors to a new section of Jellyfish Fields. As they wander in the area, they discover a sign that states that Shelly Superhighway will be built through Jellyfish Fields. Believing that the highway will pollute and ultimately destroy Jellyfish Fields. SpongeBob resolves to prevent the highway's creation.
SpongeBob asks Mr. Krabs for assistance, but he supports the highway, believing it can bring more customers to the Krusty Krab. SpongeBob then shows Mr. Krabs the highway's blueprint, demonstrating that the highway will run over the Krusty Krab and end directly at the Chum Bucket, revealing that Plankton is responsible for the highway's development. Mr. Krabs decides to support SpongeBob, and they both go to the Chum Bucket and try to stop Plankton from developing the highway; but the latter states that the rest of the town has unanimously voted to build it. Refusing to give up, SpongeBob and Patrick peacefully petition to stop the highway. Nobody listens to them or supports them, and they are quickly exiled for their actions. The highway It is rapidly built and turns Jellyfish Fields into a wasteland, filling Bikini Bottom with pollution.
A few days later, the Krusty Krab's business quickly dwindles due to the highway. Believing that no one will come to the Krusty Krab, Mr. Krabs decides to sell Plankton the Krabby Patty formula. Mere seconds before he does, however, the angry jellyfish from Jellyfish Fields invade Bikini Bottom and start destroying the city. Seeing this as an opportunity to demolish the highway, SpongeBob makes an appeal to the people, who agree to destroy it. Everybody in Bikini Bottom turns against Plankton and helps destroy the highway, with Plankton getting run over as he tries to save it. The characters celebrate as Jellyfish Fields is restored to its natural state.