"Are ye ready? I can't hear you!"
-Pirate who needs hearing aidsSpongeBob SquarePants is a theme introduced in 2006. It, along with The Simpsons in 2014, have been the only licensed themes since 2004 to continue using yellow minifigures as opposed to flesh-toned ones, for reasons currently unknown by the LEGO community.
SpongeBob SquarePants was prone to come out of nowhere, and disappear without warning. Starting in 2006, it released four sets. The next year, it released only one set, and it looked like the theme was going to die. But rather, the theme continued as normal in 2008 and 2009. In 2010, the theme disappeared again... but then it came back in 2011, only to leave yet again after 2012.