His battle strategies would change a great deal. Naruto is known for his diverse range of skills in the original series. But if he can only use Taijutsu, he'd likely start by observing his opponents more carefully. He'd need to analyze their fighting styles and look for patterns. Then, he'd use his own Taijutsu in a more calculated way. Maybe he'd combine different types of physical attacks, like a series of kicks followed by a powerful uppercut. He'd also have to work on his physical strength and endurance more, since he can't rely on other techniques to give him an edge.
There are quite a few. One example is 'The Taijutsu Masters of Konoha' where Naruto and a few others focus solely on perfecting their hand-to-hand combat skills.
He'd need to do a lot of strength training. Lifting weights, doing push - ups and sit - ups to build muscle. Also, he'd need to practice his balance, like standing on one leg for long periods or walking on narrow beams. And he should practice different punching and kicking combinations to make his attacks more fluid.
You can start by looking on fanfiction.net. It has a large collection of Naruto - related fanfics, and you can easily search for 'naruto taijutsu only' within its search bar. Another option is Archive of Our Own (AO3). It also has a great selection of fanfics, and you might be able to find some unique 'naruto taijutsu only' stories there.
It could be an old hermit. You know, those wise old guys who live in the mountains and have been guarding ancient ninja secrets. He sees potential in Naruto and decides to pass on the lost taijutsu to him.
Godlike taijutsu in Naruto fanfiction can also be a unique selling point for a story. Writers may create original characters with such skills to add an interesting element to the plot. These characters could have trained in secret or have some special heritage that gives them such incredible taijutsu abilities. It can lead to exciting fight scenes where the power dynamics are constantly shifting.
One great 'naruto taijutsu only fanfic' is 'The Taijutsu Prodigy'. It focuses on a new character who has an amazing talent for taijutsu and their journey in the Naruto world. Another is 'Taijutsu Ascension' which shows in - depth training and development of taijutsu skills. There's also 'Naruto: Pure Taijutsu' which explores unique taijutsu styles not seen in the original series.
A lesser - known but very interesting example is 'The Taijutsu Revolution'. In this fanfiction, a group of ninja start a revolution by using their newly - discovered godlike taijutsu skills. It not only has great action sequences but also explores the political and social implications of such powerful skills in the Naruto universe. These fanfictions all offer unique takes on the concept of godlike taijutsu in the Naruto world.
It could be developed by adding new elements from different ninja clans. For instance, incorporating some of the Hyuga clan's gentle fist principles into the dance taijutsu. This would give Naruto a more refined and precise way of attacking while dancing.
Social media groups dedicated to Naruto can be a great resource. Fans in these groups often share and discuss their favorite fanfictions. You can ask for recommendations specifically for ancient taijutsu fanfiction. Also, some YouTube channels that review Naruto fanfiction might point you in the right direction.