Overall, Hunter X Hunter's anime is relatively close to the manga. There are some minor differences in the presentation and pacing, but the core elements remain intact.
One way is through intense training. In fanfiction, a character might undergo extreme physical and mental training regimens that push their limits. For example, Gon could train in isolation with more powerful nen masters, learning new and advanced nen techniques that weren't shown in the original series. This could include more complex manipulation of his aura, like creating multiple types of nen beasts for different purposes.
There are 36 volumes of the Hunter x Hunter manga. This series has gained a huge fan following over the years, and each volume offers exciting adventures and character developments.
Well, the end of Hunter x Hunter manga is controversial. It sort of stops abruptly without resolving all the major plotlines, which has frustrated many readers.
The Hunter x Hunter manga consists of 36 volumes. This count is based on the current release status. However, it's possible that more volumes could be added in the future if the story continues to develop.