SpongeBob SquarePants Season 8 Episode 4

SpongeBob and the gang, including Patrick, Mr. Krabs, Squidward, Sandy Cheeks, Plankton and Karen, and Gary, participate in a sled worm race for one million dollars. However, just before the race begins, Plankton sneaks off to the Krusty Krab and uses a robot as his replacement in the race.