No roms specifically need EmuNAND to run, aslong as using 2.0, same exact romset plays in Either SystemNAND and EmuNAND (Non-updated and updated)
Well poop, my R4 results to be fake and can't do anything about it.....
I was thinking about this, is there some way to update to 6.3 from an original game card, like Link between worlds via the Emunand? Or it has to be via the internet option? .-.
No carts have 6.3 update, Highest is 6.2, and anyway even using a retail cart, you would still be prompted on entering eshop to update, which would then update the SystemNAND
Retail Updates differ from Online Ones
The Nintendo 3DS firmware can run in four different modes.
NATIVE_FIRM is the native running firmware for Nintendo 3DS software (including the Home Menu).
SAFE_MODE_FIRM is used for safe mode applications, such as the System Settings and System Updater.
TWL_FIRM is the Nintendo DSI's native firmware and it is used for Nintendo DS/DSi to be Backwards Compatible. Finally,
AGB_FIRM is the Game Boy Advance native firmware and it is used to run Game Boy Advance Virtual Console games.
Note that the naming convention of a firmware version, as it's shown on the 3DS System Settings, is divided in three parts: the first 3 digits represent the firmware version without eShop features (which is the one stored on retail catridges); the number after the dash represents improvements related to the eShop and can only be obtained via online update; and finally the letter at the end represents the region of the console, being the Americas (U), Europe and Australia (E), Japan (J), South Korea (K) and Taiwan (T) the five regions with exclusive firmwares for each one.