Know any good, lengthy ds games?

I am definitely going to buy Chrono Trigger when I get the chance, but I was also thinking about getting N+ or Castlevania OoE. But I'm just looking for anything fun and not too short. Know of any?

PS I'm not into Final Fantasy! (except tactics)

Any of the DS Castlevania games will take you around 10-20 hours. Order of Ecclesia didn't have much replay value, IMO.

The World Ends With You should take you a good 20-30 hours, but there's zero replay value IMO.

N+ will take you 100+ hours to clear all of the stages if you don't become an hero first. The level edit mode is horrible though.

Bangai-O Spirits may take several hours to clear all 170+ stages, but the level edit mode should take away hundreds of your hours if you're a creative soul.

Izuna 2 should take maybe 30-40 hours. Izuna 1 had a better story but 2 has much-improved gameplay.

Disgaea DS should take you 20-30 hours on your first romp.

Geometry Wars Galaxies could take 50+ hours to get Gold status on all stages, depending on your skill.

Hotel Dusk is a great time sink, especially if you like adventure games. I lent my copy out to a friend, got it back recently, and he spent over 90 hours in it.