SpongeBob Squarepants (Nicktoons Unite)

SpongeBob Squarepants is the eponymous protagonist of Nicktoons Unite. SpongeBob is a sea sponge, who lives in Bikini Bottom, along with his neighbours, Squirward and Patrick and is friends with Sandy Cheeks. He works at the Krusty Krab for his boss, Mr. Krabs, a greedy crab who is obsessed with money. SpongeBob's enemy is Plankton, who is, well, a plankton, who wants to rule the world. When SpongeBob is bored, he goes on adventures with his friends. SpongeBob has a pet snail named Gary, who meows. As told in the first episode, at a time, Plankton conquered Bikini Bottom, teaming up with Crocker (Timmy), Prof. Calamitous (Jimmy), and Vlad (Danny), forming the Evil Syndicate, SpongeBob teamed up with their greatest enemies, Jimmy, Timmy and Danny, to save the multiverse. From that time on, the four had known each other very well.

Jimmy
SpongeBob's relationship with Jimmy is well as he himself admitted the boy as a genius.

Timmy
SpongeBob has good relationship with Timmy since both being obsessed with superheroes.

Danny
SpongeBob and Danny had a good relationship as when there is nobody around him, Danny is the one who speaks up first as they often form teams to take on the villains.

Patrick
Patrick is SpongeBob's best friend and the two cannot live without each other so Patrick joined SpongeBob and his friends on adventures.