User blog comment:Godisme/Shades of the Bond/@comment-1837694-20111202050526/@comment-1393830-20111202051523

Im not to keen on this copying idea. From what we know, Kugo took Ichigo's Fullbring. That is it. He could use the Getsuga Tensho because Ichigo had Getsuga in his Fullbring. However, Bankai is entirely a Shinigami thing. It was said Kugo did not take Ichigo's shinigami powers. We know that Kugo was a Substitute Shinigami in the past. The only thing that would make sense to me currently is if what Kugo said early on had happened. That his Shinigami powers and his Fullbring had merged and that this is the result of that. A combination of Fullbring and Bankai.