Quietly one of the most influential characters in Dragon Ball, without the acts of the Low-Class Saiyan warrior known as Bardock, the legendary hero Son Goku would never have arrived on Earth to trailblaze the core five Dragon Ball anime series’ and the numerous spin-offs. Because of this Bardock has had numerous different portrayals, some of which have drastically changed how the character is depicted.
Source：https://www.cbr.com/dragon-ball-all-forms-of-bardock-explained/
