Sample the Ace Attorney Investigations 2 Web Demo
First chapter of DS game recreated at the official site.
Capcom released a demo of Ace Attorney Investigations 2 today.
That's the good news. The bad news is that the demo isn't for the DS.
Yes, it may look like a DS game, but the demo runs via Flash on your PC.
The actual content of the demo is for the most part the same as the game's Tokyo Game Show demo. You'll get to sample the investigation, conversation and logic chess components as you play through the first chapter.
For a summary of what's going on plot wise, see this story.