If you liked the Grappler Baki anime, the Anime-Planet community thinks you'd like:
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?
Both series have some really good fights. Yu Yu Hakusho has more of a joking manner and has energy balls and such, while Grappler Baki is more about the chemistry and biology of the body. Sorry, no energy balls here! In each anime they are on a journey to become the best and for some reason want to fight their dads. Hmmm....?