Nicktoons Unite! brings together the most devious minds in the Nicktoons universe, and it's up to you to fight them! Professor Calamitous has pulled together Plankton, Vlad, and Crocker to form a group known as The Evil Syndicate. SpongeBob, Jimmy, Timmy and Danny must combine their powers to defeat the Evil Syndicate and destroy the devastating Doomsday device. It's good vs. evil where only one team of Nicktoons will prevail.