If you're looking for similar to Dragon Ball Z Movie 8: The Legendary Super Saiyan, you might like these titles. All recommendations are made by Anime-Planet users like you!
Yusuke Urameshi was a normal middle school punk until he was hit and killed by a car, while saving a child. His selfless action earned him the right to gain his life back and serve as a detective of the spirit world, keeping the world of the living safe from a myriad of demons. But being reborn has its price: Yusuke must hatch a spirit beast that will develop according to his actions, and if he doesn't act in a good and honest manner, it will eat his soul. Can Yusuke protect the human and spirit worlds and still manage to save himself in the process?
Brolly is known as the pinnacle of overpoweredness. This specific DBZ movie stops at nothing to bring you a sheer monster in terms of power and will easily entertain you with hardcore fighting. On the other hand we have Yu Yu Hakusho, which has monsters that will crush their opponents just as badly. These two make a great match for each other. YYH might be a bit less on the power scale, but the fights, animation, power... everything to give you the same feeling is there.