From Luchawiki

Argenis is an AAA low cardwrestler who wears gear closely resembling Mistico, and using many of his moves. Before his debut in AAA, Argenis was quoted in magazines claiming to be a unhappy brother of Mistico, upset his sibling did not push CMLL to give him a bigger opportunity.

AAA went with "the Mistico brother" idea as the definition of his entire character, but not very far - Argenis did not make it out of the opening matches or proved himself especially worthy of a push based on his early ringwork. Argenis was not as much deficient as he was uninteresting, and AAA did little after his since his debut. By virtue of his level, he was often treated as a psuedo-Real Fuerza Aerea AAA members, but faired no better in comparisons with them than he does with his 'brother'. Argenis made less television appearance in 2008, but the exodous of midcard and lower wrestlers opened up spots for him. In May '09, enough of the original Real Fuerza Aerea group had left that Argenis was added to the group. Over the next few years, and despite few television appearances, Argenis has rapidly progressed as a flying luchador.

In 2014 he began appearing in Lucha Underground, in which they smartly abstained from mentioning his relationship to his more famous brother, allowing him to not suffer comparisons.