Maybe Sasuke teaches him the Chidori in a moment of camaraderie. And for the Rasengan, it could be an older and wiser Naruto from the future who travels back in time to teach his younger self.
Well, he might start with intense training sessions. Maybe he observes Kakashi closely for the Chidori, and for the Rasengan, he practices over and over again, gradually getting the hang of the chakra control required.
It could be Kakashi. Since he's already Naruto's teacher and he knows both techniques. He could guide Naruto in understanding the intricacies of the Chidori, like how to form the lightning - chakra in his hand, and for the Rasengan, he could give more advanced tips on chakra control.
In a fanfiction like this, the plot might involve Naruto struggling to master both techniques. He could start by observing Sasuke use the Chidori and then try to incorporate its lightning - based power into his own jutsu. For the Rasengan, he might have new insights while training, perhaps finding a way to combine it with the Chidori for an even more powerful attack. Along the way, he would face challenges like controlling the chakra flow for both techniques and dealing with opponents who are also after these powerful jutsus.
There was no official ending for the All-Metal Frenzy Chidori and Sosuke novels because the All-Metal Frenzy series had not been completed yet.
However, according to the plot and setting of the novel, we can speculate on some possible endings:
1 Chidori and Sosuke are together: In the novel " Full Metal Frenzy " series, Chidori is a girl with a complicated background. She was kidnapped by an organization and forced to participate in a series of dangerous missions. And Sosuke was a boy with a firm personality and a passion for metal. He and Chidori had a lot in common and shared a common goal. In the later stages of the novel, feelings gradually developed between the two of them and they might be together.
2 Chidori and Sosuke respectively: In the novel " Full Metal Frenzy " series, Chidori and Sosuke were both members of a metal band. They performed music in different cities. In the later stages of the novel, the two of them might be separated for work, life, and other reasons.
3. Chidori and Sosuke are not together: The relationship between Chidori and Sosuke in the novel " Full Metal Frenzy " is more complicated. They may not be a real couple but a cooperative relationship. In the later stages of the novel, the two of them might drift apart or not be together for some reason.
It should be noted that the above ending is only based on the plot and setting of the novel and does not represent the author's official thoughts. The novel " All-Metal Frenzy " series was a very popular work, and its final ending still needed to be determined by the author.
Often, they are described as being ornate and filled with magical symbols. For instance, the street signs might glow in the dark, with runes that seem to shift and change as one passes by.
You could start by thinking about the theme or nature of the gang. Maybe draw inspiration from their activities, location, or some unique trait. For example, if it's a gang of tech hackers, use terms related to technology in the call sign.