That capability is not outlined in canon, ever, to my knowledge. Not to mention is hardly what I'd call an advantage in a real fight, but then this is Shonen Sunday verse Shonen Jump here. The only thing approaching claims like that is a one-off line in the run up to the Kodachi fight about specializing in mid-air combat, which in practice seems to simply mean good at using all three dimensions in dodging.toushin wrote:to get technical ranma would have a pretty big advantage over a sharingan user simply becuase of his fighting style. The Musubetsu Kakuto Ryu is more flexible and adaptable than other traditional schools, having a less formal and structured style that allows one to combine different aspects of rival systems into a more integrated whole. one minute you'd bebe using a hard form as you attack, the next a soft form in defense. this means that the longer ranma fights the more his style changes. so the the technique the sharingan copied a minute ago is not the sameone ranma is using.
Which with all recorded users in all recorded fights happens 0 times in the middle of combat. The only thing vaguely approaching that involve a Joketsu technique. Heck, Genma and Ranma were both out when just faced with the "anyone can do it" Shi Shi Hadoken with nothing for days and days until Ranma just happened to fire one off by accident. They had literally nothing, nada, zilcho. Ditto for when Ranma lost his strength and a soft form that required no strength would have been useful they had nothing, nada, zilcho and Cologne a Joketsu, not a Anything Goes practitioner, literally bailed him out of the situation by herself from teaching the techniques to doing the Moxibustion. Canon Ranma is cripplingly dependent upon hard forms as that incident makes abundantly clear, and his hard form is not _that_ great.It can memorize Ninjutsu, Genjutsu, and Taijutsu with perfect accuracy, allowing the user to use the techniques as his own. In order to reproduce copied jutsu, however, one must have the necessary skill or ability to perform them.
for one thing the basics of anything goes demands that its practitioners already be able to do that at least with taijutsu otherwise they couldn't do the style. now as for ninjutsu and genjutsu. thats just a simple matter of reading the ki, how its users and imulatting it.
Furthermore:
1) Sharigan Users do not rely on copycatting to win a fight. The only time one really made a point of doing it to my knowledge it was used to Mind Screw the guy for easier take down. Otherwise they tend to not bother, yet seems as how you emphasized adaptability as the "advantage" of Anything Goes, that advantage goes to a skilled Sharigan user who can very easily switch between things, in the middle of combat.
2) The Sharigan's main advantage is that they can literally perceive what's going happen in the near future and they can see the Chakra in color if they have the full blown triple. This gives them a very, very significant reaction advantage over what they could do otherwise. Hence Kakashi always having that clone come from where you least expect after you engage the Doppleganger that isn't him.
3) The Sharigan itself can mess with guy to a certain degree by hypnotizing him.
In summary the Sharigan is a serious edge, but it doesn't win the war by itself. Anyone that claims that can be pointed in the direction of Lee's master and his ongoing rivalry with Kakashi. The way you beat a Sharigan is you get good enough with a solid technique set his ability to emulate it isn't relevant, and you're able to fight him while not looking him in the eye so he can't do hypnosis tricks. Except for the not looking him in the eye part it's the same way you'd win any fight of that nature.
Seems as how Ranma in this story doesn't win by fancy tricks so much as "power overwhelming" a Sharigan user is not that much of a hinderance to him if he's not Genjutsued.