Board Thread:Naruto Discussions/@comment-26210090-20150315213729/@comment-5936871-20150316010106

Obito was more compatible with Zetsu's limbs because he was a Uchiha, same with Madara, Sasuke, and Naruto too. Not to mention their bodies were still in much better shape than Guy's body was. As Guy's entire body was nearly turned to ash and was literally flaming and rapidly evaporating all of the blood and every last drop of chakra in his entire body and forcing his chakra network to work harder than it ever had before. Guy was literally a second away from dying until Naruto saved him and sustained his body. So to me it makes sense because damage would have been done to his spine too or just all nerves in general.