I’m taking the meaning of this prompt as like brawl fighting, tournaments a theme etc. I was torn between two shows for this. Yu Yu Hakusho and Dragonball.
While I do truly love Dragonball, I can’t deny that Yu Yu Hakusho just has slightly more to offer in terms of interesting characters and cool powers. I didn’t include DBZ in this because, while I do like that show too, it gets monotonous after time, and the battles are drawn out too much.
Yu Yu Hakusho centers around a boy named Yusuke Urameshi who died while trying to save a kid from getting hit by a car. He’s brought back to life by a shinigami named Botan and Koenma, ruler of the spirit world, though technically a prince, under the condition that he become a spirit detective, a person with immense spiritual powers who solves cases for the spirit world typically involving demons.
He is quickly joined by his best friend/rival Kuwabara, who had heightened spirit awareness far before Yusuke, Hiei, a fire apparition and Kurama, a reincarnated fox demon.
While the animation isn’t fantastic, the fights are incredible and many of them are very memorable. My personal favorite is the Dark Tournament arc because not only do we showcase the main group’s powers, but we also get introduced to all sorts of different demons and abilities that constantly change up the battle. There’s a couple other tournament arcs, but I find the Dark Tournament more diverse and interesting.
The characters are really memorable, even if Hiei really gives off a Vegeta vibe, only without the rivalry with the main character, and the storylines, while not being insanely original, are also memorable and well-written.
It’s just an overall great fighting anime that I’d be glad to recommend to anyone.