If your core game CIA is from a different region (e.g., USA) but your system is another (e.g., EUR), the Official Nintendo Support update from the eShop might fail. Consistent Tickets:
Tell me which you prefer and I can provide the exact steps or data you need.
While not heavily advertised, v1.2 reduces frame drops during the treacherous Ultra Warp Ride minigame, making it easier to reach those rare Legendary dens.
Whether you are using a physical cartridge or a digital copy, applying this update is essential for a "better" and more stable gameplay experience.
If the game still asks for an update after installation, your base game CIA might be a bad dump with a mismatched version number. Reinstalling both the base game and update from a trusted source like hShop often fixes this.