The core game is massive, but the DLC adds cosmetic and (minor) functional content. For the US region, DLC is region-locked by Nintendo’s infrastructure. Using a EUR DLC on a US base NSP will result in errors or invisible content.
An NSP (Nintendo Submission Package) is a digital title from the eShop. NSPs are more flexible because they can include base games, updates, and DLC as separate packages. For Sonic Frontiers, the NSP format is often preferred because it allows you to install the base game to the console’s internal memory or SD card, then layer updates and DLC on top. sonic frontiers switch nsp xci dlc update us
Warning: Do not attempt to install an update from a different region (e.g., EUR or JPN) with a US base game. Update IDs must match. Look for 01004A20C0B6800 (US Title ID). The core game is massive, but the DLC
Many users ask: Does the update ruin the Switch performance? Warning: Do not attempt to install an update
Pre-Update (v1.0.0):
Post-Update (v1.4.1 + DLC):
Verdict: The Switch version is the weakest console port (compared to PS5/PC), but with v1.4.1 and the DLC, it is a solid 7.5/10 experience.