The Law of Ueki - Season 1 Episode 11 The Law of the Robert's 10
Overview: Ueki's fight with Kuro Kage comes to an abrupt end when Kamui Rosso (a.k.a. Shiro Kage) takes out Kuro Kage. Ueki defeats Shiro Kage and is then asked to join Robert's Ten. For some reason, Ueki accepts.