I currently have 20+ games for the 3DS, so I won't bother listing them all
)
Here are the games for the 3DS that I play online: Super Smash Bros. 3DS, Mario Kart 7, and Pokemon X/Alpha Sapphire.
I've pretty much switched over to playing Super Smash Bros. and Mario Kart on the Wii U, but I play them on the 3DS every now and then.
Here is my friend code: 2793-0612-9486