Dragon Quest Monsters 2 3DS, though I guess you could just wait for Joker 3 since it'll come out soon after you get your 2DS
Taiko
Digimon World Re
igitize Decode (Yeah, the regular Re
igitize on PSP has a fan translation. That one sucks tho, it's Decode you want)
Japanese Puzzle and Dragons Z is the superior version because it has all the relic distributions up (along with some exclusive content). If you get a Western copy there's a lot of content you can't get now because the distributions are down.
If you haven't played Pokemon X or Y, you can get used Japanese copies for much cheaper than Western copies and still play them in English.
Liking Monster Strike so far but it's possible the West will get that.