Old anime with a red-haired protagonist who fights demons


I've been trying to find this anime for years, the last time I saw it was in
2002 when I was 4. I remember it was on a VHS that we rented.

It was about a red-haired boy, who I believe fought demons. He would transform
in the style of Yugi Muto into a bigger and older-looking self when fighting
those demons.

I can only remember one episode where he fought a super fast wolf-looking
demon that was actually a young marathon runner possessed by some king of a
golden eye if I remember correctly. Anyway, the red-haired boy protagonist
would eat that eye when he defeats his opponent and they would return to
normal.

That's about all I can remember, and I would appreciate all the info I can
get, thanks.




![enter image description here](https://i.stack.imgur.com/eQLtb.png)

I think you are talking about this character
[Kurama](http://yuyuhakusho.wikia.com/wiki/Kurama).

As you will he has red-hair and an older look as you said. He is fighting
demons. And also it's very old anime (1992)

