This is a common problem, and it all depends on your MicroSD. If you have another one, I would try moving it to that. If it helps any, TWEWY works on my 2GB Kingston Taiwan.
I've also read if you keep closing the ds screen quickly during that part, you can bypass it, but I couldn't get it to work. From the iTouch support; "Hi There,
We have had reports where it may be a brand issue of the MicroSD.
Here is a method to get past the freezing scene. This was provided by fellow users.
"all you have to do is during that scene as soon as it starts keep opening and closing your ds, not aggressively dont break ur ds, but u have to do it fast "