

Developed by Game Freak for Nintendo.
Role-playing (RPG) / Turn-based strategy (TBS) / Adventure / Fantasy / Kids
Pokémon Blue is the third core series Pokémon game released as a minor revision of Pokémon Red and Green, which were released earlier that year. It was thus the first solitary version in the core series of Pokémon games. Various fixes in the game include a graphics and sound upgrade, as well as the removal of several known glitches that had been found in the original pair. Outside of Japan, its graphics, game engine and script formed the basis of Pokémon Red and Blue, while the wild Pokémon and game-exclusive Pokémon lists were changed to match Red and Green.
The player character starts out in Pallet Town. When the player character tries to leave the town without a Pokémon of their own, they are stopped in the nick of time by Professor Oak, who invites them to his lab. There, he gives them a Pokémon of their own and a Pokédex, telling them about his dream to make a complete guide on every Pokémon in the world. After the player character battles their rival and leaves the lab, they are entitled to win every Gym Badge, compete in the Pokémon League, and fulfill Oak's dream by catching every Pokémon.

Role-playing (RPG) / Turn-based strategy (TBS) / Adventure / Action / Fantasy
Pokémon Gold, along with Pokémon Silver, are the sequels to Pokémon Red and Blue. They offer 100 new Pokémon to capture and train, 8 more Gyms to take on and a new Pokémon League challenge. Featuring an expanded post-game, Pokémon Gold and Silver additionally offer extra content from the previous entries in the series.

Role-playing (RPG) / Turn-based strategy (TBS) / Adventure / Action / Fantasy
Pokémon Emerald Version is a sister game to Pokémon Ruby and Sapphire. Emerald Version provided the main storyline with more depth and length, as well as making small aesthetic changes to the world and adding unique animations for each Pokémon.

Role-playing (RPG) / Turn-based strategy (TBS) / Adventure / Action / Fantasy
Pokemon Platinum is a role-playing game with adventure elements and an enhanced version of Pokemon Diamond and Pearl. Played from a top-down perspective, it has the player explore the Sinnoh region across towns, routes, and caves, catching and training Pokemon and battling them in turn-based combat. The core goals involve building a team, challenging Gym Leaders, and completing the Pokedex. This version adds new areas, expanded online features for trading and battling, and gives the Legendary Pokemon Giratina and its Distortion World a central role. It connects with other games in the generation to trade and transfer Pokemon.

Role-playing (RPG) / Turn-based strategy (TBS) / Adventure / Fantasy / Kids
Pokémon Yellow is an enhanced version of Pokémon Red and Blue that allows you to start the game with your very own Pikachu following you around on-foot and collect the 3 other starters from strangers you meet around the region. However, your goal remains the same: catch them all and become the ultimate Pokémon Master.

Role-playing (RPG) / Adventure / Action / Fantasy
Pokemon Crystal is an enhanced version of Pokemon Gold and Silver and a role-playing game played from a top-down perspective. As in the earlier versions, the player explores the Johto region, catches and trains Pokemon, and battles other Trainers in turn-based combat while earning Gym Badges and filling out the Pokedex. Crystal keeps the same core adventure while adding refinements, including the option to play as a female character and animated Pokemon sprites. It retains series staples such as a real-time clock, Pokemon breeding, and trading and battling with other games via a link connection.

Role-playing (RPG) / Turn-based strategy (TBS) / Adventure / Action / Fantasy
Pokémon HeartGold Version and Pokémon SoulSilver Version are paired Generation IV remakes of the Generation II games Pokémon Gold and Silver. Much like how Pokémon FireRed and LeafGreen revisited the Generation I story of Kanto, HeartGold and SoulSilver retell the story of Johto, with the player's starting town being New Bark Town. While the games feature several expansions in key areas, the overall plot follows the same direction as the original Gold and Silver. Some aspects exclusive to Crystal are also included. Like how FireRed and LeafGreen could link up with Ruby, Sapphire, and Emerald to complete the Pokédex by trading regionally exclusive Pokémon, HeartGold and SoulSilver can link up with Diamond, Pearl, and Platinum to obtain Pokémon unavailable in Johto and Kanto (such as the Sinnoh starters) and vice versa. Kris, despite being the female counterpart of Crystal's player character, is not included as the female player character, with a new character instead taking her place. Whether she is chosen to be the player character or not, this new character will still appear in the game. The unselected protagonist will take a pseudo-rival role similar to the unselected characters of Ruby, Sapphire, Emerald, Diamond, Pearl, and Platinum. The games were released on September 12, 2009 in Japan, February 4, 2010 in Korea, March 14, 2010 in North America, March 25, 2010 in Australia and March 26, 2010 in Europe (this excludes the Netherlands, Luxembourg and parts of Belgium due to an in-game save error, with the patched copies later released on April 2, 2010).

Role-playing (RPG) / Turn-based strategy (TBS) / Adventure / Action / Fantasy
Pokémon Red, along with Pokémon Green, are the first video games in the Pokémon series of games. They are the first paired versions of Generation I. Developed over the course of several years, Red and Green established several standards for later Pokémon games and sequels. They take place in the Kanto region, with the player having to collect eight Gym Badges to become the Pokémon Champion while also completing the Pokédex by collecting all 151 Pokémon.

Role-playing (RPG) / Turn-based strategy (TBS) / Adventure / Action / Fantasy
Pokemon Silver is a role-playing game played from a top-down perspective, in which the player explores the world, catches wild creatures called Pokemon, and trains them through turn-based battles. Set in the Johto region, it continues the core loop of building a team, earning Gym Badges, and completing the Pokedex by capturing, evolving, and trading creatures. This entry introduced 100 new Pokemon along with additions such as a real-time internal clock that affects certain events, Pokemon breeding, held items, and two new creature types. It supports linking with other games in the series to trade and battle.