Pokemon X/Y review by Polygon [no large spoliers]
Appearently 3D really drops the FPS...
3D MODELS, 2D PRESENTATION One perplexing thing about the visual enhancement is the game's refusal to utilize the 3DS's namesake in any meaningful way. In the overworld, 3D doesn't function at all. In battles, the depth of field effect isn't especially dramatic, and the game actually suffers a staggering drop in framerate when the 3D slider is turned on.
Admittedly, I never use 3D when playing games on Nintendo's handheld, so it was kind of a non-issue for me. It's just strange — Pokemon X and Y almost serves as justification for the 2DS, which lacks that 3D functionality and launches the same day as the game.
tl;dr
"POKEMON X AND Y IS THE REVIVAL THE SERIES HAS BEEN WAITING FOR"It got a 9.5/10