I don't know about 3DS games or Dead or Alive, but here are some games that I really like!
-Professor Layton (it's a series, there are three games in English so far. The first one is called something like "the curious village")
-Ace Attorney series (Phoenix Wright, Apollo Justice, Miles Edgeworth)-
-Mario Kart (it's super fun)
-Treasure World (it's kind of like a collection, you go around town and it finds wireless signals, and then from those signals you get items or currency. You can also make little songs, and there is an online community and item trading... it's so fun!
-Super Princess Peach (I like it better than the New Super Mario Bros. they have for it...)
-Touch Detective (I think there are two. It's funny)
-Tinker Bell (the original one... I know this is a kiddy game but I'm soooo addicted to it for some reason. The sequel ones are not as good)
-Ghost Trick (it's made by the same people who made Phoenix Wright)
-You Don't Know Jack
-Castlevania (but not order of ecclesia, yech)
Those are some (a lot) that i LOVE
here is a link I found that lists the top 25
http://ds.ign.com/articles/921/921522p2.html
If I had a 3DS I'd probably get street fighter ♥♥
*edit* OOHH and I forgot to say Rhythm Heaven! It's awesome and addictive.
And I forgot to say Wario Ware! !!! augh!
OMIGOD and I forgot to say the Mario RPGs--partners in Crime and Bowser's Inside Story
They're... soo... much... fun