Idashi Uchiha. Upcoming new character for Misashi Kishimoto's 3rd naruto series
Idashi is the ninja known as the shadow. he is about the same age as itachi. But this is before shippuden and after Naruto. He is one of the last members of the Uchiha Clan. He was the 1st student of orochimaru and was his best student before kimmimaru(bone boy). this is reason why orochimaru desired the sharingan. He wanted the power like idashi.
All of idashi's justus are black. His chidori is black and white like the curse mark chidori. His rasengan is gray not blue. Unlike the narra clan his shadows are mixed with both shadows (similar to the Narra Clan) and also infused with Chakra.
When idashi meets naruto they fight to see who was the strongest and it turned out they are even in terms of strength.
Idashi has a kekkei genkai that is from his father, that is the possession of black flames to a normal.
Idashi posesses a kekkei genkai as well as a unique unidentified Sharingan, this allows him to be able to:
Copy movement
Copy Ninjustu, Genjustu, and Taijustu (Sharingan)
See your chakra pressure
Control your body at his will
Summon fire without using any hand signs
Become invisible to the naked eye without leaving any traces of him.
Idashi possesses one of the Dragons of the Nations. Pyro the Phoeiox Dragon is a dragon that whom's body is covered in the amaterasu fire. It was seal by the father of Idashi, Idoshen. The 2nd brother of Madara.
He is the nephew of Madara.
http://wiki.answers.com/Q/Who_is_Idashi_Uchiha
http://wiki.answers.com/Q/When_was_idashi_Uchiha_in_the_story
Idashi Uchiha was confirmed to be canon by Masashi Kishimoto. Idashi will not make a appearance untill after the 4th great ninja war is over, sometime after if not sooner.
Most likely there will be a massive amount of disagreements concerning this subject. before any disagreements are made. Go on Facebook and Ask Masashi Kishimoto about the unknown character Idashi Uchiha. You will receive the same answer i have. "Idashi Uchiha is a canon character" Masashi Kishimoto's quote 😄.