To date, Sun and Moon have sold over 16 million copies worldwide, making them the third-best-selling Nintendo 3DS titles, after Mario Kart 7 and their predecessors, Pokémon X and Y. Upon release, the games became some of the fastest-selling games in Nintendo's history at that point. Sun and Moon and any of the 6th generation games (X, Y, Omega Ruby and Alpha Sapphire) and lets you transfer and store up to 3,000 Pokemon online. The games received generally favorable reviews from critics, who welcomed the change from the formula used by prior Pokémon games and praised the gameplay of Sun and Moon while criticizing the lack of content beyond the primary plot.

Pokémon may also be traded in from other games just like in previous installments. While largely independent of one another, the two games follow a similar plot, and while each can be played separately, trading Pokémon between the two games is necessary to complete the Pokédex. Sun and Moon introduced 81 new Pokémon species, and new features such as Alolan forms of previous generation Pokémon, powerful moves known as Z-Moves, alien creatures known as Ultra Beasts, updated battle and training mechanics, and improved polygonal 3D graphics. They follow a young Pokémon trainer's journey around the Alola region-based on Hawaii-with the objective of the games being to complete the island challenge and prevent the schemes of Team Skull, and later the Aether Foundation, all while attempting to challenge various Pokémon trainers of gradually increasing difficulty. The titles began development following completion of Pokémon Omega Ruby and Alpha Sapphire, with increased emphasis on Pokémon interactions, and relationships.

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