He first appeared in Ganbare Goemon Gaiden 2: Tenka no Zaihō, where he is a playable character and joins Goemon and Ebisumaru in their quest. He later reappeared in Kiteretsu Shōgun Magginesu and Mystical Ninja Starring Goemon, the latter in which he could transform into a flying dragon and take the party to previously visited areas. His last appearance was in Mononoke Dōchū Tobidase Nabe-Bugyō! for the Game Boy Color.
In Mystical Ninja Starring Goemon, Koryuta is found working for the Oedo Tourist Center, where he lends his services by carrying customers throughout Japan while in dragon form. When Goemon and friends arrive to the tourist center agency, the attendant informs them that their dragon has been behaving strangely lately and asks them for help.
The team makes their way to the dragon's head while this is soaring through the skies and find a mind-control device which is being remotely operated by Colon. They manage to destroy it, and as a result, they end up falling all the way to the earth below, albeit unscathed. A long-haired kid all dressed in blue soon crashes near them and identifies himself as being the same dragon they were just riding on.
Goemon and the rest explain him he had been hypnotized by the Peach Mountain Shoguns and that they were using him to kidnap kids with dancing talents all over Japan. Deeply ashamed for taking part on such a foul scheme, he lends Yae his flute, telling them that whenever they play it, he would come in dragon form and transport them wherever they want.
Appearance and personalityEdit
Koryuta wears a blue traditional Japanese children's attire and wristbands, although perhaps his most characteristic feature is his long, messy, blue hair which covers half of his face.
In Tenka no Zaihō he acts more like a brat, albeit one with a noble heart who joins Goemon and his friends on their quest. In Mystical Ninja Starring Goemon, he appears to behave more childlike and innocent, and shows himself deeply concerned for knowing he took part on all the kidnappings that were being carried all over Japan; so much that he promises to come to their aid and take them wherever they want any time they require so.