With Contra 4 about to give us a heart attack, and Ninja Gaiden also on the way to make us doubt our ability to do things, we thought we'd ask you about the difficulty of currently-available DS games. There are some brutally hard games out there, and we're sure you've run into one of them. Some are difficult for not-so-great reasons, like control issues, but some are just hard.
What's the most difficult game you've played on the DS? And did you enjoy it? Bonus points if the game isn't Trauma Center.