"SpongeBob" may never end, but these Nickelodeon series finales went out on top.
"SpongeBob" may never end, but these Nickelodeon series finales went out on top.
"SpongeBob" may never end, but these Nickelodeon series finales went out on top.
Our countdown includes "Invader Zim," "Zoey 101," "Hey Arnold!," and more!