Dragon Ball Z is a fast paced anime based on the Dragonball manga and anime series. There are seven dragonballs in all. When you collect them, you can summon the great dragon, and he will grant you any wish. A person's strength is measured as their power level. A regular man might have a power level of four or five, but many have past the thousand limit. When there is a large fight, like when Vegeta and Nappa came to Earth, the fight itself is always long and eventful. Usually Goku is the strongest, or second strongest when there is a new enemy saga. So, like, in the Majin Buu Saga, Majin Buu is the strongest (duh). If Goku is not the strongest, and there is no enemy stronger than him, it would then probably be Trunks or Vegeta that is the strongest.
There are many "sagas" to DBZ. Since I don't know much about later DBZ, I'll just list them for now.
- The Saiyan Saga
- The Frieza Saga
- The Cell Saga
- The Majin Buu Saga
Profiles
General
Piccolo(In-Depth)
Image Galleries
Piccolo
Trunks