1.) How often do Sky3ds cartridge get obsolete? if they add a feature in teh future like a cheat system will they replace the current cartridge with a new one? 2.) I have a normal US 3ds that can run gateway and i have emunand on it can i transfer that to my japanese 3ds? 3.) will the sky3ds work on japanese new 3ds xl? 4.) is there a way for me to update my Monster Hunter 4G on my new 3ds xl Japanese without updating my firmware?