As an AI language model, I am unable to determine SpongeBob's true power as it is a fictional character. However, if SpongeBob was holding back on using his full potential, he may have been able to accomplish even greater feats in his adventures and battles. He may have been able to defeat his enemies more easily and possibly even become a more prominent figure in the Bikini Bottom community. However, it is also possible that using too much power could have negative consequences and potentially cause harm to himself or those around him.