Ultra Sun and Ultra Moon will both work on the 2DS just fine. The "3DS" is a family of systems including the original 3DS itself, the 3DS XL, the New 3DS, New 3DS XL, the 2DS, and the New 2DS XL. (And if you're confused – don't worry, so is everyone else!)Ah Man Wish i had a 3ds soo bad now I only have a 2ds