I'd like to contribute these screenshots:
New Super Mario Bros runs almost perfectly. It's very slow, but you can get in game and playable. I finished the first level (but trying to take a screenshot, I accidentally crashed it by right clicking and selecting link).
It takes around 35-45 minutes to load the intro. You can get it to this speed by selecting these settings:
Speed - Unlimited MHZ Disaster 10%
Video Output - 8bit Monochromr
NDS Cartridge Backup Media - EEPROM 64kbit
Sound Output - None, Low 10khz
Joysticks/Gamepads - Disabled (fast)
it runs slightly better that way.
There are graphical errors: in the intro and title screen, the ground sometimes flashes up and down, and Mario and Peach and Bowser Jr have a weird effect on them (this happens on the Mario & Luigi PiT battle sprites too).
In-game, everything is fine. But there are some missing parts in models, like in my screenshot. It runs faster in-game than in the intro.