Chapter 1

When the Triceratons use the black hole generator in Ninjago, It's up to the Teenage Mutant Ninja Turtles to assist the ninja in defeating this new enemy of theirs as only they know about them. However when the Triceratons succeed and Ninjago is gone, both teams with the Help of the most powerful being in the multiverse and the Spacemice, they must stop the Triceratons from endangering the whole Multiverse.

This story is a crossover between Tmnt 2012, Ninjago, and the Geronimo Stilton Spacemice series. It takes place after season five of Tmnt 2012, after season 15 of Ninjago, and after book 12 of Geronimo Stilton: Spacemice.