Re: We had an early clue that it could of been Obito.
People are going both ways on this issue, but clearly Tobi did not retrieve Diedera's elbow from the other dimension.
Originally Posted by lilshell43
Kakashi sent his elbow to the other dimension and his lower arm fell to the ground, which was later retrieved. Now while Kakuzu did sew his arm back together, it was not his original elbow that Kakuzu used, but it still allowed his arm to function.
Basically Diedara was a human ragdoll before all was said and done. having his left arm severed and re-attached, and later his right elbow was sent to another dimension and had to retrieve his severed forearm.... for shame young blast element user, for shame.