Nicktropolis

Nicktropolis was a collection of bumpers that ran from early 2005 to mid-2000. It was a crossover between many of Nickelodeon's famous Nicktoons.
==Bumpers:==
.SpongeBob SquarePants
.Rugrats
.Rocket Power
.The Wild Thornberrys
.Hey Arnold!
.Fairly Oddparents
.Jimmy Neutron: Boy Genius
.All Grown Up!
.Danny Phantom
.Avatar: The Last Airbender 
.Catscratch
.The X's
.Kappa Mikey
.El Tigre
.Back at the Barnyard
.Wayside
.Tak and the Power of Juju
.The Mighty B!