Hart made his AAA debut on November 20, 2007 in an Extreme Four Way tag team Ladder Match, where he teamed with Sabu against Crazy Boy and Joe Lider, Charly Manson and Chessman, Extreme Tiger and Halloween for the AAA World Tag Team Championship at Guerra de Titantes. Soon after joining, Hart joined Konnan's heel stable Legión Extranjera (Foreign Legion), where he regularly teams with Evans as The Hart Foundation 2.0. Part of his villainous character is that he cannot speak Spanish and during his promos, AAA captions his remarks in Spanish. On March 16, 2008, Hart lost a $2500 Ladder Battle Royal Match to Xtreme Tiger, which also included Chessman, Juventud Guerrera, Halloween and Joe Lider at Rey de Reyes. On June 13, The Mexican Powers (Crazy Boy, Último Gladiador and Ricky Marvin) defeated La Legión Extranjera (Bryan Danielson, Jack Evans and Teddy Hart), and La Familia de Tijuana (Extreme Tiger, Halloween and TJ Xtreme) in a Three Way Elimination match at Triplemanía XVI. On September 14, La Hermandad Extrema (Joe Lider and Nicho El Millonario) defeated The Hart Foundation 2.0 (Teddy Hart and Jack Evans), The Mexican Powers (Crazy Boy and Último Gladiador) and La Familia de Tijuana (Extreme Tiger and Halloween) in a Four Way Ladder match for the World Tag Team Championship at Verano de Escandalo. After the loss, Hart and Evans began feuding with Lider and Nicho and on October 24, La Hermandad Extrema defeated The Hart Foundation 2.0 (Teddy Hart and Jack Evans), and Los Bello Stones (Alan and Chris Stone) in a Three Way Ladder match for the World Tag Team Championship at the 2008 Antonio Peña Memorial Show. On December 6, Hart and Evans wrestled to a double countout against Lider and Nicho for the World Tag Team Championship at Guerra de Titanes. On March 15, 2009, El Zorro, Hart and Evans defeated Charly Manson and D-Generation Mex (X-Pac and Alex Koslov) at Rey de Reyes. In June 2009 Hart and the rest of Legion Extranjera turned on Evans and kicked him out of the stable. On June 13, Team AAA (El Hijo del Santo, La Parka, Vampiro, Octagón and Jack Evans) defeated La Legion Extranjera (Silver King, Chessman, Kenzo Suzuki, Electroshock and Teddy Hart) at Triplemania XVII to regain control over AAA and force Konnan out of the company. On August 21 at Verano de Escandalo Konnan and Hart returned to AAA with their new version of La Legion Extranjera. In early 2010 AAA suspended Hart indefinitely.

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