The Uzumaki Identity
Bourne Identity x Naruto
After the fight, Sasuke uses his Sharingan to erase Naruto's memories of Konoha, Team 7, and especially the fight they just had. Naruto awakens shortly after Sasuke's departure and wanders into the forest, looking for a town to escape the rainstorm he was caught in. Finding one, he is disgruntled to learn no one knows him. When Oto-nin notice him, Naruto's fighting impulses return and he quickly kills them in defense.
Dumbfounded at what he'd done, he realizes he needs to rediscover his identity. He names himself 'Menma' after his new favorite meal (ramen). He travels through the lands, heading north and east, asking for people who know him and looking for familiar places. He continuously has to outwit and fight against the various ninja villages who see him as a threat. His strength, speed, power, and infiltration skills grow dramatically as a more dangerous ninja attack him.
When he sails to Kiri, one of the ninja who attacks him mentions his Uzumaki crest and is surprised to see there's any left. With that clue, Menma travels to Nami and finds the ruins. While there, he's attacked by a pair of super strong ninja in black and red-clouded cloaks who seem to know exactly who he is. Though he manages to outwit and escape them, Menma is alarmed to realize he had a mercenary group after his life. Needing protection, he adopts a disguise to better hide (dyed black hair) and goes off to learn more about the Akatsuki.
Menma follows the clues and guesses they were after the Jinchuuriki. He anticipates an attack on the Kazekage and rushes to Suna. On his way, he senses the Ichibi's chakra and follows it until it vanishes. He arrives as Gaara dies, sneaking through the barrier and recklessly attacking the two present members, trying to get his answers. Suddenly, the barrier drops and a team of Konoha-nin rush in. Though surprised at the unexpected help, the Konoha-nin rush to help him. Menma chases after Deidera with Kakashi at his heels. Despite their best efforts, Deidera still escapes.
Returning to the others to ensure no one else died and that they wouldn't blame him, Menma learns that Chiyo had a resurrection jutsu and yelled at her to revive Gaara since it was the humane thing to do. She eventually complies and Gaara's reborn. Menma finds himself with a befriended Kage and a village in debt to him, which he just shrugs off and leaves to restart his search.
As he's leaving, the Konoha-nin approach him with a request to go to Konoha and answer a few question about himself. Due to his past dealings with village ninja, he's extremely weary of their seemingly good intentions. Still, he's tired of wandering and decides to risk it (Konoha's good reputation helps ease his conscience). When he arrives, he meets the Hokage and submits to a mind scan (hoping to regain lost memories). When it was discovered his earliest memories were of the Valley of the End, the Konoha-nin were shocked and overjoyed to realize Menma was Naruto. But they were confused and hurt to learn of Menma's mindwipe. Tsunade gives Menma his old apartment back and the Rookies drop by constantly to reconnect with him (Menma finds himself immediately enchanted by Hinata).
He doesn't become an official enlisted ninja for a 'probation period' that's necessary to screen him in case he's some kind of sleeper agent. When he learns of Sasuke, Menma grows determined to find him and demand answers.
Uzumaki Menma's skills
Menma possesses many of Naruto's skills and ninjutsu, namely Kage Bunshin and Rasengan. But he's much more tactically minded than Naruto was, able to find a weak in most opponents' forms and exploit it with cold precision, especially when his life is on the line (which it usually was). His travels across the continent have given him a very broad range of situations and enemies to face, making him very versatile with tons of combat of experience for his age. Though able to use most kinds of weapons, he prefers to use the common kunai and shuriken because they're the most easily acquired.