Shaman King: Master of Spirits is video game made by Konami. This is the first Shaman King game that was developed for the Game Boy Advance in America. It was developed to accompany the English dub by 4kids Entertainment.
On his quest to advance in the Shaman Tournament and defeat Zeke, Yoh and his friends run into a man named Magister, who plans on resurrecting the demon king Mephias. With the help of his friends and their Guardian Ghosts, Yoh must stop Magister at all costs.
Shaman King: Master of Spirits, much like the anime and manga it's based on, is centered around Yoh Asakura and his battles to become Shaman King.
The story within the game plays like a "Sidestory", referring to elements within the story of both the manga and anime whilst not conforming to any particular continuity. In it, Yoh's goal is to stop the Guardian of Demons from being resurrected by a gang of rogue shaman.
Gameplay in Master of Spirits is similar to classic Castlevania games.
The game itself, whilst not having fatal flaws, does have its critics in response to its simplicity and overuse of map exploration, a surprising lack and simplicity in the moveset for Yoh and the lack of health pickups in the areas (Health can only be recovered by spending money to buy health items).
Gamespot - Shaman King