Having failed to win the tournament, Eddy struck a deal with Jin Kazama Jin promised to find a cure for the old man if Eddy joined the Tekken Force as a ranking officer. A medical exam revealed that he was suffering from an incurable, terminal illness but the doctors noted that a cure may possibly be found with the advanced technology of the Mishima Zaibatsu, which motivated both Eddy and Christie to join the fifth King of Iron Fist Tournament. In the short 2-year timespan between Tekken 3 and Tekken 5, he had turned into a frail, old man. He was the grandfather of Christie Monteiro as well as the man who taught Eddy Gordo Capoeira while they were both incarcerated in the same prison, roughly eight years prior to the events of Tekken 3.