Ryūichi Hattori (服部竜一 Hattori Ryūichi, はっとり りゅういち Hattori Ryūichi) is a fictional character and the older Dragon Twin in the Kunio-kun series. He first appears in Downtown Nekketsu Monogatari.
In River City Ransom, the western localization of the game, he is renamed Randy. He retains this name in River City: Tokyo Rumble
Ryūichi is the captain of the Reihou Academy team.
Ryūichi plays the role of Tatsuichi in the historical drama play. Just like in Downtown Nekketsu Monogatari, Tatsuichi along with his twin brother Tatsuji kidnap Okoto (whose role is played by Hasebe).
Ryūichi returns as the captain of the Reiho Academy team.
He doesn't appear in the game's western localization, Crash 'n the Boys: Street Challenge. He is replaced with another character.
Ryūichi is one of the many available characters that can be added to any of the player's custom teams. He is also in the game's cover art, sporting a mullet similarly to the one Billy Lee had at the time in Return of Double Dragon.
Ryūichi is the captain of the Reiho Academy team.
Ryūichi is a bonus boss in the game.
River City Super Sports Challenge ~All Stars Special~
In this remake of Downtown Nekketsu Kōshinkyoku: Soreyuke Daiundōkai, Ryūichi is again the captain of the Reihou Academy team.
A remake of Downtown Nekketsu Monogatari, Ryūichi has a similar role to that game.
Ryūichi is back as the captain of the Reihou Academy Team.
- in River City Ransom: Underground Randy only appears in the game's prologue, a flashback sequence in which the player plays through the final level of the original (starting with the fight against Ivan until facing Slick. Strangely, even though they were Cindy's original kidnappers, they do not appear in the present portion of the game.
- Ryūichi has a height 176 cm (5'9").
- Ryūichi is loosely based on Billy Lee, one of the main protagonists of the Double Dragon series of beat 'em up games, which in turn was directly derived from the Kunio-kun series. The iconic "Double Dragon" theme even plays whenever he and his twin brother, Ryūji, appear.