User blog comment:ARZC/Mastering the devil fruits/@comment-4618942-20120307203118/@comment-4684192-20120308012837

and for chopper i wouldnt say he mastered is zoan devil fruit because its in part cause he's medical expertise that he was able to develop new tranformations and was then able to master them probably other zoan users would be able to master other transfomation if they had rumble balls...speaking of that would rumble balls work for other zoan users ????? or are they made specially for choppers molecular structure lol ? would be nice if yes !!