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SpongeBot SteelPants

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SpongeBob meet SpongeBot.
~ Robo-Plankton

SpongeBot SteelPants is a villain that appears in the video game SpongeBob SquarePants: Battle for Bikini Bottom as the final boss.

In the console versions, he is a bigger metal version of SpongeBob SquarePants in karate gear with jet flames coming out of his pants (allowing it to fly and damage SpongeBob though contact), transparent eyes, and a mouth in the shape of a speaker. In the GBA version, he is only twice the size of SpongeBob with red eyes and a metallic Krusty Krab hat. He also has a claw left hand and a spatula right hand.

Despite looking male like the regular SpongeBob, he is classified as a female according to his fiancé Robot Plankton, and they were going to be wedded the week after their global takeover.


The battle takes place in the Chum Bucket lab with the roof being cut open and the floor being destroyed.

Console Version

SpongeBot has nine generators on his body that are his weak spots: two on his hands, four on each side of his head, two on the sides of his body, and one on the tip of his nose. While the two on his hands can be destroyed by the Bubble Bounce, the rest must be destroyed with the Cruise Bubble. SpongeBot shares three of his health points with Robo-Plankton, who shoots at SpongeBob each time three generators (two for the fist time) on SpongeBot are hit and must be taken down with a Cruise Bubble. SpongeBot's attacks by karate chopping at the platforms SpongeBob stands on, and always ends with a karate slap, where he rests himself for a while, allowing SpongeBob to hit him with a Cruise Bubble. As he loses more generators, SpongeBot throws more chops at Spongebob and performs the "Kah-Rah-Tae" ability, where the three syllables pop out of his mouth and hit the three platforms he stands before.

After all generators are destroyed, SpongeBot falls defeated (landing on SpongeBob in the process), but is revived thanks to Robo-Plankton and grows Anchor Arms. Spongebob follows Robo-Plankton into SpongeBot through his ear. SpongeBob then hits several fuses throughout the robots body, while also destroying robot enemies and hitting Robo-Plankton with the Cruise Bubble while avoiding his laser beam. Once the three fuses in his "brain" are hit, SpongeBot knocks SpongeBob and Robo-Plankton out of his head before his arms deflate and he collapses backwards.

Gameboy Advance Version

In this version, SpongeBot's only attack is throwing Krabby Patty bombs at SpongeBob, which can be eaten and spat out by Mystery back at the robot, meaning the fight cannot end without her. Only 6 bombs are required to take SpongeBot down. But since the arena fought on a conveyor belt, SpongeBob must keep moving to the left of the screen while jumping over the bombs to avoid falling to his death.




  • SpongeBot MusclePants was meant to be his own boss fight instead of just a cutscene, but this was cut due to technical limitations. The fight can be played through the game's coding, but it is unbeatable due to collision errors with the machine's arms, with the game crashing if they hit the player.
    • Since the unused fight is playable with Patrick it is possible that the boss was meant to have multiple phases with each of the playable characters, SpongeBob, Patrick, and Sandy, with each character having their own specific phase during the fight, similar to the boss battles against Robo-Sandy and Robo-Patrick.
  • It is possible to defeat both phases of the console version without using the Cruise Bubble.
  • SpongeBot does not appear in the PC version of Battle for Bikini Bottom.