“2RAR installed. Rarities found: memories, balance, and one really good pie.”

Here’s a short fanfiction inspired by Miitopia with the details you gave (NSP Update 103 2RAR interpreted as a mysterious update code in-world). Let me know if you want it longer or changed. The sun hung low over Miitopia’s cobblestone streets, painting the bakery’s windows gold. The town—their town—still smelled of sugar and adventure, but the air buzzed with something new: a chalked notice pinned to the noticeboard, stamped with an odd code.

—End—

“You mean we go through both?” the Healer asked, fingers already tightening around their wand. The two orbs pulsed as if pleased.