Spongebob, Patrick, Timmy, Frankie, Jason, Nia, Danny, Sam, Jimmy, Sanjay and Craig, Feliciano, Ludwig and the Rabbids accidently got stuck in the 2nd dimmension. Then, some dimmensional villains kidnaps the others characters. So its up to them and the other leftovers to save the others and defeat the villains. And to get help defeating the mystery villain, they get help from the Ni Hao Kai-Lan characters.