Core series/Classification/Content Model

While there are no strict rules that make a game a core series game, and previously assumed rules are continuously broken, the games generally have a similar plot and mechanics.

The undefined begins the game in a small town or city of a given region, having no of their own. Through a course of events, the player will receive a starter Pokémon from the region's Pokémon Professor; the starter Pokémon is always a choice of three, a Grass, Fire, or Water type, and the character who will become the player's rival will typically choose (or already have) the Pokémon whose type is super effective against that of the player's choice, although some exceptions to this pattern exist.

After this point, the player begins to journey across the entire region (each with their own cities and towns, themselves connected by routes), any wild Pokémon he or she chooses to, and using a party he or she assembles to take on the eight Gym Leaders of the region. Alongside encounters with both other s and repeated interactions with their rival, the player must also stop the plans of a villainous team, which often involve the manipulation of Legendary Pokémon.

After all eight Gym Leaders have been defeated, the player can enter the Pokémon League, where the Elite Four and await challengers. The Champion of the region is often introduced prior to the player's Pokémon League challenge, and may aid the player as he or she continues his or her adventure.

Though the game can be considered over as soon as the player has defeated the Champion, there is still post-game content. Often there is a post-game plotline and locations and facilities that could not be previously accessed. Since Pokémon Crystal, there is usually at least one facility specifically dedicated to. The overarching goal is the completion of the Pokédex; after this has been done, the player will receive a diploma for completing the regional Pokédex and, starting in Generation III, another for completing the National Pokédex. Another task was added in Generation III in order to fully complete the game: obtaining all stars.

Another element that characterizes a core series game is that the geography of regions includes at least one water route, a mountain, several caves, a forest, as well as a final route leading up to the Pokémon League called Victory Road.