SpongeBob SquarePants (1999)

S9E27 SpongeBob LongPants

SpongeBob begins donning long pants, and this change in wardrobe dramatically alters his demeanor. He becomes more serious and less carefree, surprising his friends with his newfound attitude. This transformation leads to unexpected consequences, as his usual lighthearted spirit seems to fade away. SpongeBob's friends are concerned about the shift in his personality and try to figure out how to bring back the fun-loving sponge they know and love.