main venue, Arena Mexico. He participated in the 2017 version of La Copa Junior but was eliminated from the tournament before the finals. At that point, the Reyes brothers began being referred to as Nueva Generación Dinamita (Spanish for "New Generation Dynamites"; NGD)—a reference to their heritage. On March 18, 2016, Nueva Generación Dinamita worked their first major show for CMLL, defeating Soberano Jr. and Oro Jr. in the opening match of that year's Homenaje A Dos Leyendas supercard show. CMLL decided to have both El Cuatrero and Sansón participate in their annual Torneo Gran Alternativa ("Great Alternativa Tournament"), where younger wrestlers team up with established veteran wrestlers for the tournament. El Cuatrero was paired with Rey Bucanero, but the duo lost to Tritón and Místico in the first round. A year later, El Cuatrero was teamed up with his uncle Máscara Año 2000 for the 2017 version of the Torneo Gran Alternativa, but like the 2016 tournament, El Cuatrero did not make it past the first round as the team lost to Esfinge and Atlantis. While El Cuatrero's first years on the main roster had seen little success, July 2017 proved a turning point in how Nueva Generación Dinamita was booked. El Cuatrero and Sansón defeated Black Terry and Negro Navarro to win the CMLL Arena Coliseo Tag Team Championship, CMLL's second-highest ranked tag team championship. Three days later, the trio defeated Los Hijos del Infierno (Ephesto, Luciferno, and Mephisto) to win the Mexican National Trios Championship, making El Cuatrero a triple champion. The trio would go on to win CMLL's La Copa Dinastia tournament, defeating the trios of Blue Panther, Blue Panther Jr., The Panter, and then Dragon Lee, Místico, and Pierroth. On January 19, 2018, as part of the annual 2018 Fantastica Mania tour of Japan, El Cuatrero defeated Ángel de Oro to win the CMLL World Middleweight Championship, holding four championships simultaneously. The match and championship change was the beginning of a long-running storyline feud between El Cuatrero and Ángel de Oro, where challenges for a Lucha de Apuestas match soon followed. On February 14, 2018, Nueva Generación Dinamita announced they were giving up the CMLL Arena Coliseo Tag Team Championship. The storyline explanation was that NGW wanted to focus on winning the CMLL World Tag Team Championship, a step up from the Arena Coliseo championship. The feud between El Cuatrero and Ángel de Oro reached