The sixth generation (Generation VI) of the Pokémon franchise features 72 fictional species of creatures introduced to the core video game series in the 2013 Nintendo 3DS games Pokémon X and Y. Some Pokémon in this generation were introduced in animated adaptations of the franchise before X and Y. This generation featured the series' largest graphical overhaul: a shift from two-dimensional sprites to three-dimensional polygons. A new type (Fairy) was introduced for the first time since Gold and Silver in 1999, bringing the total to 18. Greater emphasis was placed on making Pokémon species more unique and in-tune with the culture and fauna of Europe, namely France.

It has been suggested that Greninja be merged into this article. (Discuss) Proposed since April 2024.

All Pokémon were created by a team of roughly 20 artists, led by Ken Sugimori and Hironobu Yoshida. For the first time in the franchise, the generation's legendary Pokémon—specifically Xerneas and Yveltal—were not designed by Sugimori alone; he requested the help of Atsuko Nishida to move their designs forward.^[1]

The following list details the 72 Pokémon of Generation VI in order of their National Pokédex number. The first Pokémon, Chespin, is number 650 and the last, Volcanion, is number 721. Alternate forms that result in type changes and Mega evolutions are included for convenience.

Development of Pokémon X and Y began in 2010 and the games were released worldwide on October 12, 2013.^[2] Director Junichi Masuda revealed the three main themes of Pokémon X and Y to be beauty, bonds and evolution.^[3] Beauty was the core focus and Masuda felt France to be a prime example of such; he brought a team to the country for study in 2011.^[4] With the games taking place in a region based on France (called Kalos), design inspiration stemmed more from European culture^[1] (e.g. the legendary trio of Xerneas, Yveltal and Zygarde have their roots in Norse mythology).^[5] More focus than usual was placed on giving new Pokémon unique elements for this generation.^[2]

A major design change for the franchise was the shift from two-dimensional sprites to three-dimensional polygons. This required a larger development team than past games, with more than 500 people involved with the games' development, inclusive of localization teams.^[6] Emphasis was placed on retaining the iconic style of Pokémon art director Ken Sugimori who has been designing Pokémon and creating the franchise's official artwork since Red and Green in 1996.^[7][8] A new type was also added into the game for the first time since Gold and Silver in 1999: Fairy type. This type was introduced to balance out the Dragon, Fighting, Poison, and Steel types. Dragon was previously only weak against itself and Ice, and only resisted against Steel. Fighting previously was super-effective against five different types (Normal, Ice, Rock, Dark and Steel) and only weak against Flying and Psychic types. Poison was previously only super-effective against Grass, resisted against itself, Rock, Ground and Ghost types and ineffective against Steel. Steel previously was only super-effective against Ice and Rock types and resisted against itself, Fire, Water and Electric types. Aside from this, Ghost and Dark are now neutral against Steel, improving the offensive usefulness of both types. Multiple Pokémon from previous generations, such as Jigglypuff, Gardevoir and Marill, were retroactively assigned the new type while 13 new Pokémon, most notably Sylveon, donned the type.^[9] A new mechanic called Mega Evolution—a temporary form change akin to normal evolution—was also added for more dynamic battles and stemmed from the concepts of bonds and evolution.^[2][3] Mega Evolutions "refined designs to a new extreme" according to Yoshida and required considerable effort.^[2] They were made temporary to retain balance in battles and only made possible when a Pokémon is holding their respective Mega Stone to prevent players from giving them a different advantageous hold item.^[2] The only Pokémon from Generation VI capable of Mega Evolution is Diancie. A variant of Mega Evolution called "Primal Reversion" was introduced in Omega Ruby and Alpha Sapphire; this mechanic is exclusive to the legendary Pokémon Groudon and Kyogre.^[10]

The titles X and Y, representing the x-axis and y-axis—also reflecting different forms of thinking^[11]—were chosen early in development.^[6] The simplicity of the names was also related to the simultaneous worldwide release of the games.^[11] Designers additionally sought to make the Pokémon names the same in every country whenever possible. Masuda expressed that this effort proved exceptionally difficult as the names have to feel fitting to their physical appearance and not infringe upon any rights.^[12] At the request of Masuda,^[11] the shapes "X" and "Y" were used as the framework for the boxart legendary Pokémon: Xerneas and Yveltal.^[6] Normally, Sugimori designs the legendary Pokémon by himself; however, he required assistance from designer Atsuko Nishida to create Xerneas and Yveltal.^[1] Finalization of their designs took about 18 months, 3 times longer than normal.^[13] Manga artist Hitoshi Ariga was requested to assist in creating Pokémon for X and Y; Ariga ultimately designed ten species for the games.^[14] It is speculated by fans that the designs for the Chespin, Fennekin and Froakie evolutionary lines stem from typical role-playing game character classes, such as those in Final Fantasy. Chespin represents the knight, paladin and fighter classes; Fennekin represents the witch, mage and magician classes; and Froakie represents the ninja, thief and rogue classes.^[15]