Twentieth-century shonen titles like Fist of the North Star and Dragon Ball helped set the stage for today's shonen anime world, but it was the "big three" that really made shonen the #1 demographic for anime. Those three titles redefined what shonen can be, introducing or reinventing staples such as the power of friendship, the virtue of hard work, and the pain of betrayal.
Source：https://www.cbr.com/naruto-scenes-changed-shonen-forever/
