Wish I had a Ds...
... No, wait... is it online? Can it be? Is there a working emulator yet?
Yes, your loving masters at GBAtemp have been working day in and day out without sleep for the last month to bring you a fully working DS emulator with online play capabilities! Just don't tell anyone...it's a secret...
I've made my way through 50cc already (it was a breeze) and have started 100cc now.