Deliberate mistake: Several of the matches Nacho loses, he should actually have won. In Mexican pro wrestling, it is illegal to rip another's mask off, and results in immediate disqualification. This happens twice to Nacho, both in the fight with the midgets and in the final against Ramses.
Deliberate mistake: In the final fight, Nacho pins Ramses outside the ring. Under Lucha Libre rules, a pin must take place inside the ring to be valid, so Nacho would not have won a bout this way, and the announcer did not mention anything about there being any special rules or stipulations for the match, such as "Falls count anywhere".
Answer: The song is Hombre Religioso (Religious Man) by Mr. Loco.
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