Which game should I get for my DS, since it needs some new games in it.

Final Fantasy IV DS
The World Ends With You
Advance Wars Days of Ruin
Or wait and get Chrono Trigger DS?

 Chrono Trigger DS is not coming out still the holiday session, so thats a long time to wait. If you have never played Final Fantasy IV before I thinks thats a good choice. Good game play, great story.  Then again its the only game in your list that i have played, other than Chrono Trigger. 

I agree with Chaos: I wouldn't wait for Chrono Trigger. I think you should go with FFIV.

FFIV yepers

advance wars :P

Final Fantasy IV DS if you have never played the game on any other system.
If you have played FFIV on another system then get The World Ends With You.

" Chrono Trigger DS is not coming out still the holiday session, so thats a long time to wait. If you have never played Final Fantasy IV before I thinks thats a good choice. Good game play, great story.  Then again its the only game in your list that i have played, other than Chrono Trigger. 
"

FF

I would recommend The World Ends With You. It's something unique and different...not just a remake of an old ass game.

FF IV

Chrono Trigger if you can wait, if not then get FF. Get both?

I would say FFIV if you never played FF2 on the SNES

Wait for chrono trigger

I would either get Final Fantasy IV or Advanced Wars.

I would say FFIV, my favorite from the list.

Though, The World Ends With You is great too.

I guess it depends on if you want something new that you havent played before.

"Which game should I get for my DS, since it needs some new games in it.

Final Fantasy IV DS
The World Ends With You
Advance Wars Days of Ruin
Or wait and get Chrono Trigger DS?
"

It really depends your preferences,do you like FF a lot? Not saying you have to for that to be a good game,have yet to tr it though but have seen good reviews.
I've heard The World Ends With You is an amazing game though,got incredible reviews when it came out,and was praised for its originality and gameplay style.I would go with that  for sure.

You cannot go wrong with any of them.  No matter what, you win.

Enjoy.

I would wait for Chrono Trigger.