SpongeBob SquarePants (1999)

S3E19 Party Pooper Pants

SpongeBob gets his hands on a "Throw The Best Party Ever" kit and decides to host a party, inviting all 177 of his nearest and dearest friends. However, chaos ensues when he inadvertently locks himself out of his own house while the festivities are in full swing. Now, he must find a way to re-enter and rejoin the fun.