I pretty much made this after seeing how many units of X/Y are being sold per week, it's insane. This game has been out for months now and still manages to generate 40k per week. I think it might be stronger than cod nowadays.

Wii Sports
Mario Kart wii (Still selling to this day)

GTA V. It still occasionly get into the top ten, Even on both platforms.

I think it's Minecraft ...

DEM QUADS.

Minecraft and GTA have great legs. CoD also. Not sure if any of them have better legs than Pokemon X/Y though.

Edit: Actually yeah Minecraft has better legs I would think than Pokemon X/Y

Out of the current games, Minecraft, GTA V, Pokemon, and Mario Kart 7 and 8 have great legs.

Almost any Nintendo big first party game seeing as some of them sell great for years after they release.

GTA V and minecraft.

What makes GTA Vs legs so impressing is that even though it has sold 15million + on each plattform it still sells great.