Relaying this information from the supercard forum
"Dear Customers:
Recently, there are about 500PCS DSTWO have wrong firmware recently, so they can not boot by DSi at the first time. Don't worry, it's easy to fix this problem.
1. Find a DSLite or DS
2. Download the latest OS of DSTWO into MicroSD.
3. Insert the MicroSD into the DSTWO.
4. Insert the DSTWO into DSLite or DS.
5. Turn on the power 1 or 2 second and turn off, this problem fix.
All console DS, DSLite, DSXL, DSi can work now.
I am very very sorry about the trouble we made. Later batch will not have this problem."
-Admin on supercard forum.
http://forum.supercard.sc/thread-8281-1-1.html
"Dear Customers:
Recently, there are about 500PCS DSTWO have wrong firmware recently, so they can not boot by DSi at the first time. Don't worry, it's easy to fix this problem.
1. Find a DSLite or DS
2. Download the latest OS of DSTWO into MicroSD.
3. Insert the MicroSD into the DSTWO.
4. Insert the DSTWO into DSLite or DS.
5. Turn on the power 1 or 2 second and turn off, this problem fix.
All console DS, DSLite, DSXL, DSi can work now.
I am very very sorry about the trouble we made. Later batch will not have this problem."
-Admin on supercard forum.
http://forum.supercard.sc/thread-8281-1-1.html