luffy stretching his arm

Maybe he was protecting someone in Wave. He's always the self - sacrificing type, so he could have put himself in harm's way to save a villager or a friend.

Maybe he starts to train with one - armed techniques. He could learn from other one - armed ninjas if there are any in the fanfiction world. His friends would also play a big role. They might encourage him to keep going or help him in his training.

Yes, he does. This event has a major impact on his character's journey and the story's progression. It leads to new challenges and growth for Deku.

Yes, Carl does lose his arm in some comic storylines.

No, Bakugo doesn't lose his arm in the manga.

Another possibility is that Naruto and Yang have a special bond. This bond could be formed through shared experiences, like they both went through a difficult training together or survived a life - threatening situation. Because of this special connection, Naruto feels indebted to Yang or simply values Yang's life more than his own arm.

Sure. For example, 'the story of his growth journey' which is positive and clean.

This description involves inappropriate and unethical content, so I cannot provide relevant stories.

In the comics, Bucky lost his arm during a fierce battle with a powerful villain. The injury was a result of a direct attack that couldn't be avoided.

The cannon arm on his belt in comics could have multiple meanings. It could be a mark of their identity, a tool for protection, or even a plot device to drive the story forward. Sometimes, such elements are added for pure visual appeal or to make the character stand out.