Thank you
Majora's Mask can't ask an update, so the game is definitively 9.0 or lower. They have to take in consideration people who don't have internet access and as the game is written "preinstalled" and not "downloadable", it have to run without any updates.
I can confirm this too, as Majora's Mask did indeed come "preinstalled" on the console. The game runs with the console still on 9.0.0-20E. No update required. I guess that doesn't confirm the cartridge version too, but I would be surprised if it was different from the preinstalled digital version.