Weaknesses

Lack of Physical Strength: Due to his physiology, SpongeBob's natural physical strength appears to be below average. Even one instance exaggerated this whereupon close inspection, his hand was depicted in the emaciated state as if it was only skin and bone. Although, SpongeBob can also build up his strengths several times he normally capable of by sheer force of will, with his prowess depend on the writers of the episode.

Gullibility: Spongebob's gullible personality made him prone to manipulation of others who used him for their gain or made him unknowingly hurt others, physically and emotionally. The most controversial of this is in "A Pal for Gary," where he was too gullible by Puffy Fluffy's manipulation that made him mistreat Gary and be ignorant with the fact that Puffy Fluffy was in fact, one of the most dangerous sea predators.

Cowardice: SpongeBob often lacks the willpower to stand up for himself. Even his arch-nemesis Plankton points this out in "Walking Small" when beachgoers were walking all over SpongeBob (ironically enough, Plankton himself was forcing SpongeBob to do his bidding in the same episode). Patrick even takes advantage of SpongeBob also in "Suds," "Hooky," and "Rock-a-Bye Bivalve."

Driving (boatmobile): He is not good at driving because he always crashes into buildings and/or hits people with his boat.

Distraction: When trying to get back home to watch the lost episode, she was interrupt for a second.