Genki is a boy who loves playing the Monster Rancher games and one day he's somehow transported into the world of the video game where he meets the girl Holly and the monsters Mochi, Suezo, Golem, Tiger and Hare. Together, they are searching for a way to revive the Phoenix, which is the only monster capable of stopping the evil Moo.
Holly's past is finally revealed! She shares her story with the gang on a miserable, rainy day. She tells of how she came to be on the quest for the Phoenix with Genki and the others.
Genki and his friends continue their journey, and find a huge canyon, as well as a beat-up airplane. They take the plane, but has Genki been double-crossed by the pilot? The group must fend off the evil Kuro in order to get out of this predicament.
Genki and friends arrive in Heaven Canyon via the iron bird. In the canyon are humans mining “mystery disks” under the oppression of Moo. Are Genki and his friends strong enough to defeat them and free the imprisoned humans?
After scaling a cliff, Genki and Mocchi must free their captured comrades and find a way to defeat Clay, Pixie, and Big Blue!
In search of a mysterious disk, Monol tells of a great story from the past.
Genki and friends meet paths with the infamous Moo. Will they be strong enough to defeat him?
