SD Hiryuu No Ken Densetsu is a Nintendo 64 fighting game released exclusively in Japan. It serves as an enhanced version of Hiryuu no Ken: Twin, featuring additional characters from the Super Chinese series, expanded items, and a new gameplay mode. The game replaces the realistic Virtual Mode with a super deformed Quest Mode, providing a unique gaming experience. Playable characters include Ryuhi, Hayato, and others, with unlockable options.
An updated version of Hiryuu no Ken: Twin (Flying Dragon overseas), entitled SD Hiryuu no Ken Densetsu (lit. SD Legend of the Fist of the Flying Dragon), was released in Japan only, adding more characters (such as Jack, Ryu, and Gofire from the Super Chinese series), items and a new gameplay mode. It also removed the more realistic `Virtual Mode`, favoring the super deformed `Quest Mode`.
Playable characters are Ryuhi, Hayato, Min Min, Wiler, Shouryu, Yuka, Suzaku, Powers, Robo No Hana, Bokuchin (unlockable), Jack, Ryu, Raima, E. Quaker, Ellie, Gofire, Ryumaou (unlockable).