 In 2005 Rocky Romero debuted as Black Tiger IV by NJPW and immediately thrust into a feud with Tiger Mask IV, facing him for the IWGP Junior Heavyweight Championship on May 14.He made his debut for Ring of Honor in America, making him the first Black Tiger to wrestle as Black Tiger in America since Mark Rocco.After winning the NWA World Junior Heavyweight Championship on August 25 he defeated Tiger Mask for his title on October 8, defending them until losing both to Tiger Mask on February 19, 2006.