He uses his ninja skills, of course. His shadow clone jutsu can be very useful for scouting and distraction. And his Rasengan is a powerful attack that can fend off many threats.
In this fanfiction, Naruto could be isolated in the Forest of Death. He has to fend for himself, which means he has to figure out how to get food, water, and shelter all on his own. This experience might make him more self - reliant and independent. He may also develop a different view on the concept of family and friendship since he has been alone for so long.
Well, it could be that Naruto discovers a dark secret about his team or the village during the Forest of Death exercise. His so - called friends then think he's a threat and betray him. He might be left alone to fight against powerful enemies like the Sound Ninja. Naruto, being the determined character he is, would then strive to become stronger and show that he's on the right side. He could start training alone in the forest, learning new jutsus to protect himself and seek revenge if necessary.
Sasuke could be a likely candidate. He's always been somewhat jealous of Naruto's growth and popularity. In the stress of the Forest of Death, he might let that jealousy get the better of him and betray Naruto. Maybe he thinks that by getting rid of Naruto, he can be the only strong one in the team.
In some fanfictions, a plot twist could be that the Forest of Death is a testing ground for a prophecy. Naruto is unknowingly part of this prophecy and the events in the forest are all set up to trigger his true power. The forest creatures and the challenges he faces are all there to awaken a dormant ability within him. For example, he might discover that he has the power to control the very essence of nature within the forest, like the trees and the water, which was hidden from him until now. This would be a huge change for his character and open up a whole new set of adventures and challenges for him.
In the fanfiction, Naruto being abandoned in the Forest of Death could lead to him making unexpected alliances. He could meet some strange creatures that at first seem hostile but end up helping him because they recognize his tenacity. He might also discover some ancient secrets or jutsu hidden in the forest that could change his fate in the ninja world.
It could be a group of outcast ninja who have made the forest their home. They might see Naruto as an opportunity, either to use him or to help him out of their own sense of justice or just for the fun of it. They may have different views on the ninja world and could influence Naruto's perspective in different ways.
Naruto might also experience a change in his mental state. The Forest of Death is a very dangerous and unpredictable place. He could become more cautious and strategic. Instead of just charging into battles like he usually does, he might start to think more about his actions and their consequences. This would be a big step in his growth as a ninja.
One possible plot could be that Naruto discovers a hidden conspiracy within the Forest of Death that led to him being left there. Maybe some rogue ninja or a hidden enemy within the village set him up.
Well, if Team 8 had a different outcome, it might have changed the dynamics of the entire fanfiction. Maybe one of the team members unlocked a new power or formed an unlikely alliance.