one piece the copy copy no me

the fruit it self

so I'm going to take the first chapter to explained so the way the fruit work is that if the user is able to see a character use there power he can store it in his body and use it when ever he sees fit so um let me give you an example so if let's say the character saw law use his ope ope no me and law went room and shambles  the main character can the do room and shambles when ever he wants but it also depends on how the person the main character so say if he meets nightmare luffy he could actually transform into nightmare luffy form not literally but he can do it with out the hundred shadows and he can do all of his techniques and skills like gear 2 and 3 gumo gumo no pistol gatling and all of his techniques but since it is nightmare luffy he can also sword fight  like him yet he can't copy haki or like with nightmare luffy if the main character copied his powers he would get gear four yet he would have the potential to get it by himself with out copying it but he also has a key limit he has to be able to see it isn't that say whitebeard used the quake quake no mi 50 feet behind him he could do it he has to be able to do  he also has one other thing he can't copy their fighting style like with say ace he can't copy the way ace fights he only knows he techniques the character's name I have been thing about for a while it Is fullsteel D.  heart joker why because it sounds cool go on say it out loud fullsteel D.  heart joker