YokuRyuOh (Jap. ヨクリュウオー) is one of the Kishiryu ("Knight Dragon" mecha) from Kishiryu Sentai Ryusoulger (2019) and is commanded by Koh, the RyuSoul Red. It is based on Kishiryu Pterardon, a pterosaur-type creature (Jap. 翼竜, yokuryū = "winged dragon") that debuts in episode 31. The Kishiryu has three states: an egg, the flying-dragon form Pterardon, and finally the humanoid robot form YokuRyuOh. It is a secondary Kishiryu robot rather than the series' main Megazord (KishiryuOh). The US adaptation Power Rangers Dino Fury reused the Ryusoulger footage; however, the DX release described here is the standalone, Japan-exclusive Bandai product and is not identical to Hasbro's separately engineered Dino Fury toy line.

YokuRyuOh's head is formed by the HieHie Soul (Jap. ヒエヒエ, "icy cold"), one of the RyuSoul keys; accordingly the mecha is built around ice/cold powers (cryokinesis) and flight, and wields the HieHie Claw on its right arm. YokuRyuOh fights on its own or in combinations: with the DX Tyramigo it forms the winged dragon configuration Ptyramigo, and it further merges into larger formations such as KishiryuOh Jet and the top-tier combination King KishiryuOh, each of which requires additional, separately sold DX Kishiryu.

The DX toy was released in October 2019 by Bandai (Japan) as "Kishiryu Series 11 – Ryusoul Gattai DX YokuRyuOh" at a suggested price of ¥6,280 (excl. tax); the "11" in the database name refers to this Kishiryu series numbering. The transforming toy converts from egg to the pterosaur form Pterardon and then into the YokuRyuOh robot. The set includes the HieHie Soul, a sound key that simultaneously forms the robot's head and can also be used with the separately sold DX RyuSoulKen. Whether die-cast (metal) parts are included is not reliably documented in the available sources; as is typical for Bandai's DX mecha, the model is predominantly plastic. As a Japan-exclusive Bandai release, the set differs substantially in construction from the Hasbro Dino Fury counterpart.