While competing on World Fighters, Takao could launch Dragoon to temporarily attack his foes. Dragoon would release the sacred beast Seiryū to create a swirling vortex of energy, called Evolution Storm, which grew in power the longer Takao charged his Beyblade's spin. DreamMix TV World Fighters
Character art for Seiryū appears as one of Takao's Library profile images in DreamMix TV World Fighters.
While the game doesn't specify which version of Dragoon is being used by Takao, it is safe to guess that he is using Dragoon MS, as it's the only Dragoon that uses the Evolution Storm.
Western localizations of Beyblade would refer to both the Beyblade and sacred beast (called Bit Beasts in the west) as Dragoon.
The character profile from DreamMix TV World Fighters treats Dragoon and Seiryu as the same entity, contradicting what the anime establishes.