The Pokémon series is one of the most popular and long-running video game franchises of all time. It was created by Satoshi Tajiri and Ken Sugimori and was first released in Japan in 1996 for the Game Boy. Since then, the franchise has expanded to include multiple genres. Here is a chronological list of the main pokemon series in order:

Pokémon Red and Green (1996)

These two games were the first entry in the Pokémon series and were released in Japan in 1996. Players control a young trainer who sets out on a journey to catch and collect all 150 Pokémon and become the Pokémon League Champion. The games were later re-released as Pokémon Red and Blue in North America in 1998, 

Pokémon Yellow (1998)

This game was released as a special edition in Japan and North America in 1998, and was based on the original Pokémon Red and Green. However, it added new features and changes to the gameplay, such as the ability to have Pikachu follow the player. It is the second in pokemon series in order.

Pokémon Gold and Silver (1999)

These two games were released in Japan in 1999 and introduced 100 new Pokémon to the series, bringing the total to 251. The games also added new features, such as a day-and-night cycle and the ability to travel between two regions.

Pokémon Crystal (2000)

This game was released as a special edition of Pokémon Gold and Silver and was released in Japan and North America in 2000. It added new features, such as the ability to choose the player's gender and to see the Pokémon's animation during battles.

Pokémon Ruby and Sapphire (2002)

These two games were released in Japan and North America in 2002 and introduced 135 new Pokémon to the series, bringing the total to 386. The games also added new features, such as double battles and the ability to see the Pokémon's ability during battles regarding pokemon series in order.

Pokémon FireRed and LeafGreen (2004)

These two games were released in Japan and North America in 2004 and were remakes of the original Pokémon Red and Green. They added new features and changes to the gameplay, such as the ability to trade Pokémon with other players wirelessly.

Pokémon Emerald (2004)

This game was released as a special edition of Pokémon Ruby and Sapphire and was released in Japan and North America in 2004. It added new features and changes to the gameplay, such as the ability to have double battles with two trainers.

Pokémon Diamond and Pearl (2006)

These two games were released in Japan and North America in 2006 and introduced 107 new Pokémon to the series, bringing the total to 493. The games also added new features, such as the ability to see the Pokémon's personality during battles. It is another important one in pokemon series in order.

Pokémon Platinum (2008)

This game was released as a special edition of Pokémon Diamond and Pearl and was released in Japan and North America in 2008. It added new features and changes to the gameplay, such as the ability to have triple battles with three trainers. It was a hit one as many viewers watched it from different parts of the world. 

Pokémon Black 2 and White 2 (2012)

These two games were released in Japan and North America in 2012 and were sequels to Pokémon Black and White. They added new features and changes to the gameplay, such as the ability to have multi battles with demons. It is the last one regarding pokemon series in order.