Serial: XAJ700420XXXXX.
Serial on device matches serial on box: No.
(The above serial number is on the box.
The bottom of the dock has the serial number XFL701123XXXXX.)
Region: EU.
Firmware: 4.1.0.
Color option: Gray.
Store: Nedgame.
(Store in The Netherlands.)
Was a bundle (if yes, which): No...
If you're eager to play, use Rudolph's patch. You can find it right on this site.
Pokémon HeartGold (U) works perferctly on my R4DS SDHC, now. Even the save file from the previous crachable version still works on it.
And if I want to play the (U) version, with the original USA texts, Pokémon-names and stuff..?
I just don't want to lose all the gameplay I have to this point, on the unpatched (U) version. Is that possible?