|This article is about a/an monster in Hikari Sentai Maskman.|
Ryu Doggler (リュウドグラー Ryūdogurā, 24): Appearing in Inasha-cho, the dragon-like Ryu Doggler feeds on the Midorigoke Moss that grows in the Ryugashi Cave. It turn its victims into monsters. One such victim was a boy named Daisuke; the process was incomplete as the boy retained his human will. After Daisuke regains his human form, the Maskmen blast this monster with the Shot Bomber and destroy it with Great Five.