Something I picked up recently for the DS. It's an adventure game, although its particular gimmick avoids the need to pixel-hunt... it's more that you know exactly what items you can use, the issue is when and in what order. It's also especially notable for the lovely fluid character animations that add a strong sense of personality and fun (helpful when you're dealing with a murder mystery, which could otherwise get depressing!)
As I blogged earlier, it has a free flash demo online.
Most memorable character of those I've encountered so far? Probably the dog. It's a fluffy, yippy little Pomeranian who appears to have a set of kitsune tails and really wants to help, but isn't terribly bright... well, what do you expect? *pets fluffball*