Dragon Ball is a landmark shonen series, and many elements featured in its pages, such as powerful transformations and world-rending special attacks, have become staples of the genre. Another concept popularized by Dragon Ball is the power level system, which numerically ranks characters by their strength and fighting ability. Power levels have become one of the major talking points in the Dragon Ball fandom, with many people arguing about characters' power levels long after its use in the series proper had ended.