During an independent circuit show in Georgia, The Young Bucks came to the ring to offer the Lucha Brothers an All Elite Wrestling (AEW) contract in a confrontation that ended with a verbal agreement and a handshake. It was subsequently revealed that Pentagon Jr. and Rey Fénix had agreed to a non-exclusive deal with AEW, due to their legal obligations to Lucha Underground. On February 7, 2019, at the "All Elite Wrestling" Ticket Announcement held at the MGM Grand Pool Splash, in Las Vegas, Nevada. The Young Bucks were leaving the stage as The Lucha Brothers music played seeing Pentagón Jr., and Fénix making their first appearance with the company. The two teams faced off before a brawl ensued seeing Pentagón striking Matt Jackson first, while Fénix took out Nick Jackson with a super-kick. Pentagón then proceeded to package-piledrive Matt Jackson on the stage, before cutting promos and advertising themselves for the upcoming debut Pay-Per-View for the company, Double Or Nothing before exiting the stage. At Double Or Nothing, Pentagón Jr and his partner Fénix lost their AAA World Tag Team Championship to The Young Bucks. They won back the titles in a rematch organized by AAA at Verano de Escándalo. This led to a six-man tag match at AEW Fyter Fest, where the Lucha Brothers teamed with Laredo Kid in another losing effort against The Young Bucks and Kenny Omega. On the October 30, 2019 episode of AEW Dynamite, the Lucha Brothers lost to SoCal Uncensored in the finals of a tournament to decide the first ever AEW World Tag Team Champions.