I got my 3ds and mario tennis from the states when i was there a few months ago and I had no problem playing online. I got back home a few days ago (cyprus) and i tried playing online but it didnt work for some reason. i tried changing the region but my country wasnt even on the list. anyone knows what i can do? Thanks.

I don't know if this is a region lock problem, but it probably would be wise to call Nintendo.

alright, thank you