That unseen tickler in http://www.furaffinity.net/view/2099188/ ?

It's this contemplative fellow, Dr. Roo (like in the Steely Dan song, "are you with me, Doctor Roo?"), Professor of Transformology. He's trying to figure out why his last plush animal conversion went so terribly wrong. (Hey doc, maybe you shouldn't try to put 500 pounds of stuffing into a 100-pound kangaroo...)