Overdrive monsters are most the same as normal monsters, but their max for each stat is 1500 instead of 999. When a monster is created through combination while using the respective overdrive slate for its main species, it becomes a overdrive monster. There are also overdrive slates, one for each monster, which can be obtained later in the game from battle royals. Most combining items change the outcome of the combination, like the Dragon Fang which makes the new monster be a dragon. Players can also use special combining items when combining monsters. The stats and the accomplishments of the two monster that are being combined are used to determine the potential and stats of the new monster. However, the sub species of either monster can not be used for the main species of the new monster. They can choose what the main species and sub species of the monster by selecting the main species of one of the monsters for the main species, and the sub species by selecting the main species or the sub species of the other monster. Players can also combine two monsters to create new monsters. While the sub species defines the exact base stats of the monster and the details of its appearance, such as coloring. A monster is mostly defined by its main species, which dictates what stats it specializes, what attacks it has, and most of its appearance.

Each type of monster has a main species and a sub species, which define the monster's main qualities and details, respectively. The player can choose a monster to raise on their ranch. The player can create monsters by drawing on the DS' touch screen with the Magic Field and by speaking into the DS' microphone through Incantations.

New monster rancher games