Episode 503: The Birth of Kakobi.
Team 7 came face to face to this masked villain. As Tobi spoke to them his voice sounded familiar. Kakashi came running at him and sliced him with a kunai. Kakashi flinched a bit at the same time Tobi did. Tobi did rapid seals and shot out fire balls, Kakashi dodging them much to his liking. They punched at the same time and kicked at the same time. They were equal in strength. Naruto came to help him and punched Tobi but Tobi stopped it and threw him flying. Kakashi came running at Tobi and punched him in the face. Tobi coughed out blood at the same time Kakashi did. Tobi walked past Kakashi ears and muttered a Jutsu in his ears. Then he did some seals and Kakashi did the same.
"How long will you keep this up? Let's just kill them off and finish off the plan." Tobi said in Kakashi's ear. Kakashi flinched at this thought.
"Not yet. Pretend to do Mind Control on me and then I'll attack them. When my Dark chakra builds up we will become one once more." Kakashi told him. Tobi did rapid seals [not the real seals for it and slammed his hand onto Kakashi's forehead. Naruto and Sakura screamed out for their Sensei and chakra was sent into Kakashi. Kakashi's eyes turned dark and gloomy. Kakashi grinned and ran with Tobi and punched Sakura and Naruto. Naruto ran for it and span out several kunai's. Kakashi dodged them and Tobi reflected them back with chakra. Sakura slammed her fist into the ground and shot out an earthquake and sent Tobi flying in the air. Naruto appeared in the air and slammed his leg into Tobi's head. Smoke shot out and it was revealed to be a log. The real Tobi appeared behind him and threw him into the ground as Kakashi shot up and punched him through the stomach. Smoke shot out from Naruto revealing to be Sakura. Sakura slammed her fist onto Kakashi's forehead but was to slow. Tobi grabbed Sakura and Naruto and tied them together. He did rapid seals and shouted out a jutsu.
"Mind Transfer Level Two!" shouted Tobi quickly. Sakura was sucked into Naruto and Naruto was sucked into Sakura. Sakura/Naruto ran at them with Naruto speed and slammed her/his fist into Tobi quickly. Tobi dodged it and sliced at her /him hair, cutting off the yellow pieces of her. Naruto/Sakura came running at Kakashi and slammed his/her fist into Kakashi's face. Kakashi dodged it and ran up to Kakashi. Kakashi stood next to Tobi as they both did the same seals. Tobi did one half of the Ram seal and Kakashi did the other.
"Ninja Skill: Returning Soul Jutsu!" they shouted out quickly. Black and Blue Chakra formed together and formed into one. Tobi and Kakashi came one again. Naruto and Sakura returned to their bodies and looked confused at their sensei. Tobi's body was there but the Sharingan in his eye was dark. The Black Hair stood in Kakashi style and Tobi's mask was still there.
"I am… Kakobi. The Nightmare of my birth once more, is here." Kakobi said.