I have Art Style: Aquia, Art Style: Boxlife, and Mighty Flip Champs for DSiware. My favorite of these is Mighty Flip Champs.

Mighty Flip Champs is a puzzle platformer in the vein of Braid on Xbox Live. The basic gameplay mechanic has you overcoming obstacles by flipping to different versions of a level mirrored on the bottom screen. There are no enemies. The main means of death is to flip to the mirrored screen while the main character is above spikes or inside a wall. The puzzles get devilishly clever as you go along (there are about 42 puzzles I think) with some puzzles having 6 screens to flip to and multiple objectives (rescue more than 1 NPC). Also, you are scored on how many turns/the amount of time it takes to complete a puzzle. There are multiple shortcuts to completing each level so the replay value for going back and mastering a level in the least amount of turns/shortest amount of time is high. Graphically, this game has a pleasant 8-bit Capcomesque art style.
Overall, this is a great game by up and coming developer Way Forward (Lit, Contra 4, upcoming Boy & His Blob Wiiware title) and should be top of the list for anyone who likes puzzles, platformers, or wants a solid DSiware title. I actually think this could be the start of a new type of puzzle platformer on DS and could be considered a genre classic over time if enough people buy it.
I will post more impressions of the other games later...Stay tuned.
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