In the games, the player takes the role of a monster breeder whose goal is to raise monsters to fight in tournaments. The genre Monster Rancher occupies is shared by other simulation virtual pet games, such as Digimon, and games based on raising horses for racing, like in the Gallop Racer series, also by Tecmo. While the Pokémon games are traditionally collection-based role-playing video games, Monster Rancher games tend to be simulated animal breeding games. Monster Rancher is often compared to Pokémon, though the two series play differently. Now ranchers across the globe come together and enter battle. Eventually disc stones were found around the entire world. In a place where ranchers and monsters coexisted peacefully, the battle of the monsters began! As time passed these monster battles became extremely popular, and monster breeding became the standard pastime of the land. There the priests, using the ancient methods, unlocked the monster inside the disc stone. The worker who first discovered a disc stone took the disc to the Monsters' Temple. One day a group of workers excavating the ancient ruins happened to dig up one of these mythical disc stones. It is said that one monster is trapped inside each one. It is said that the 'disc stones' are almost impossible to find among the ancient ruins. Today people still continue searching for these missing 'disc stones' to unlock the lifeforms within. Many years have passed since then and god entrusted the humans with the secret of 'disc stones'. However, new life forms brought new troubles, so god became exasperated and sealed them in 'disc stones'. People prayed to god for help, and god created new life forms.

Before the world's continents broke up into pieces, a huge disaster hit the world.

New monster rancher games