I don't understand the anime ending. I don't like it very much, it's confusing I don't understand what happened to Dark, except that he was once again sealed together with Krad.

I love the manga better, in both story and art. The anime is not good drawn at all, they have so small necks. Daisuke is the strangest looking one. T^T poor little Daisuke.
So yeah, the manga is definitively better. Yukiru Sugisaki has an incredibly good drawing style.