Juuouki was released in June 1988 in Japan.
The title of this game translates from Japanese as 'Beast King Account'.
Juuouki was moderately successful, the player's ability to transform into different creatures being a big draw.
Alex and Stella from "Alex Kidd" are declared dead in the first stage of this game (Alex and Stella stones).
The small tail swinging gryphon that appears often in this game makes a comeback in "Golden Axe
The Last Boss of game, a pink rhino named lord Neff, appear, on the 2012 animation movie "Wreck-It Ralph" from Walt Disney Animation Studios.
Pony Canyon / Scitron released a limited-edition soundtrack album for this game (G.S.M. SEGA 1 - D28B0002) on July 7, 1988.