Planet nicktoons korra was practicing her airbending when a big flash of light came spongebob came from the light! Korra said who are you? I'm spongebob squarepants he said I came to warn you about kron!!! Who's kron korra said spongebob explain a monster who is pure evil he can destroy the nicktoons from past, present, and future that is when the wise old crab send me here OK korra said how can we stop him? Well first we need all of the nicktoons jimmy and Otis are working on gadgets who are jimmy and Otis korra ask there's no time!!! Spongbob said we need to go now.