It ends at a specific chapter, but I can't recall exactly off the top of my head. You might want to check online manga forums or dedicated One Punch Man fan sites for the precise chapter.
There are many interesting fan stories. For example, some fans create stories where Saitama has to face an opponent who can nullify his one - punch power. It adds a new level of challenge to his character.
Is it true that the author of One Punch Man is a fan of Dragon Ball?
Yes, the author of One Punch Superman, Monkey D Luffy, was indeed a fan of Dragon Ball. He had also used Dragon Ball's elements and memes as reference when creating his own manga. However, this did not mean that there was a direct connection between One-Punch Superman and Dragon Ball because Hungry Wolf had not touched Dragon Ball for a long time when he created One-Punch Superman. His works also incorporated his own unique style and elements.
You can find 'One Punch Man' fanfictions on websites like FanFiction.net. It has a large collection of fan - created stories related to 'One Punch Man'. There are different categories and ratings, so you can easily filter and find the ones that suit your taste.