If the Irken Empire was to actually invade Earth. How would the cast from any Nickelodeon Show handle it?

Keep in mind I said Nickelodeon not just Nick toons. So that means places like Seattle (iCarly) is just as a valid as a location as Dimmsdale (fairly OddParents)

We're going with the idea that every Nickelodeon show and movie takes place on the same Earth.