Dragon Ball, Shijou Saikyou no Deshi Kenichi Recommendations
Those animes shows that training is the way of pain. Just by watching those series you can feel, that even you can do something to be better one.
In both series main hero gains friends after fighting them before as enemies.
Both are martial arts anime. Both main characters beats evil guys and sometimes makes them his followers.
both MCs Goku and Kenichi generally have a similar hairstyle
both fight with a sense of justice
training before each battle and gradually getting stronger each time is the main ongoing trend in both the dragon ball series and kenichi the mightiest disciple
there's a perverted master in both shows