Todd SquarePants is one of SpongeBob's cousins. He is very messy because in the book The Never-Ending Stay, he takes off his socks and it is so smelly that Squidward tried to complain but SpongeBob didn't let him. When SpongeBob and Patrick came back from 120 Conch Street (Patrick's house) there were smelly socks and pizzas everywhere.
He was born to an unknown Mr. and Mrs. SquarePants.
When he was an adult, he stayed with SpongeBob for a few days.
"Can I come in?"
"You don't mind if I stay for a few days, do you?"