Along with his brother, Wen Yong Fa, Li was a member of the Shadow Allience. But after a while, he starts doubting Ababa and Enjyu and starts communicating with Yamato and the gang. Li's b-daman is called Rekuso. Li and his brother work very well together, they can combine their B-damans, Red Dragon Rekuso and Blue Dragon Bakuso, to take control over BakuRekuso. Li's attack is called Crimson Light.
(Source: Absolute Anime)