The Crash X Aniversario, also known as The Crash Decimo Aniversario (Spanish for The Crash 10th Anniversary Show), was a professional wrestling supercard event, scripted and produced by the Mexican lucha libre promotion The Crash Lucha Libre, which took place on November 5, 2021 at Auditorio Fausto Gutierrez in The Crash's home town of Tijuana, Baja California. It was the fifth event under The Crash Aniversario chronology. The event commemorated the creation of The Crash Lucha Libre in November 2011 and is their biggest show of the year.