In fanfiction, Naruto's fake smiles can be a sign of his hidden pain. He often puts on a brave face to hide his insecurities and the loneliness he feels. For example, when he is around his friends who don't fully understand his inner turmoil, he might fake a smile to keep the mood light.
Well, in some fanfictions, he might get it from a skilled ninja prosthetics maker. This maker could be someone who specializes in creating artificial limbs for ninjas who have lost their arms in battle.
One common theme is adaptation. Naruto has to adapt to having a fake arm, whether it's in combat, training, or daily life. Another theme is often power - up. The fake arm might give him new abilities or enhance his existing ones. For example, it could be a super - strong arm made of some rare material that lets him punch through walls or something.
Often, Naruto's fake smiles are shown as a quick flash of teeth without the usual warmth in his eyes. In some fanfictions, his friends might notice this but not fully understand the depth of his pain.
Look for inconsistent character behavior. If Naruto, who is known for his determination in the original, is suddenly shown as a coward, it's likely a 'fake Naruto fanfiction'. Also, check for wrong use of jutsu names or incorrect descriptions of the ninja ranks and their responsibilities.
Often, in 'fake Naruto fanfiction', there are over - the - top romantic subplots. These might involve pairings that are not likely or even possible in the original Naruto world. Also, some might feature alternate universes where the basic rules of the Naruto world are completely changed, like a world where ninjas don't use chakra but some other form of magic - like energy.
It could have enhanced strength. Since Naruto is already quite strong, the fake arm might be designed in the fanfiction to multiply his physical power, allowing him to punch even harder or hold heavier objects.
It could be Orochimaru. Even though he's had his moments of redemption, he might relapse into his old ways. He could see Naruto's 'death' as an opportunity to carry out some evil plan that Naruto would have stopped. Maybe he wants to use Naruto's death to create chaos and then take advantage of the power vacuum in the ninja world.
One interesting Naruto fake arm fanfiction could be one where Naruto gets a special prosthetic arm after a battle. It might have unique abilities, like being able to channel chakra in new ways. Maybe it was crafted by a hidden master. Another could focus on how he adjusts to having a fake arm in his daily ninja life, dealing with tasks that were once easy but now are a challenge.
Well, a plot could involve Naruto faking his death as part of a training exercise that was actually set up by the older generation of ninja. They want to see how the new generation will react and grow without Naruto's presence. So Naruto goes along with it, but things get complicated when some of his friends start to suspect it's not real and go on a quest to find out the truth. Also, he could fake his death to test Hinata's loyalty or something like that, but that's a bit more of a soap - opera - like plot.