You can't undo it.
I doubt it. Maybe if you reboot the system, otherwise no.
Do a System Update from the Start menu!
No, Nintendo's updates block Flash carts ther not going to let you use an old firmware.
No, system updates can't be undone. Once you've run the update, the old firmware is 'gone'. Running a system restore or formatting system memory, will only provide you with a clean version of the updated firmware.
You can't undo it.
All system updates for the Nintendo DSi are provided free of charge.
I doubt it. Maybe if you reboot the system, otherwise no.
no
Do a System Update from the Start menu!
Yes, the feature was added in the last 3DS system update.
No, the Nintendo DS does not use pictures. But you can transfer DSi pictures into the 3DS in a future update.
No, Nintendo's updates block Flash carts ther not going to let you use an old firmware.
No, system updates can't be undone. Once you've run the update, the old firmware is 'gone'. Running a system restore or formatting system memory, will only provide you with a clean version of the updated firmware.
You can't trade JUST you DSi system in for a 3DS system anywhere.
Yes, the system comes with Nintendo 3DS Sound, an improved version of Nintendo DSi Sound, already installed.
Nintendo DSi XL is defenitly better vecause it is bigger and has more applications on it, also its easier to log on to the internet on it.