Shaman King has become one of the most popular anime adaptations of manga to be shown outside of Japan.
An example of this would be Digimon Adventure tri., where the voice cast for the chosen children were changed from the original Digimon Adventure TV anime.
The anime actually had a different ending from its original source manga, which was written and illustrated by Hiroyuki Takei.
Sadly, no anime adaptations came after that, despite a lot of fans asking for a new adaptation.