Nintendo aggressively monitors network traffic. FIFA 19 attempts to connect to EA Servers. If a console with Custom Firmware and pirated NSP files connects to Nintendo’s servers (even just to update rosters), the console’s unique certificate (Device ID) risks being banned. A banned console cannot access the eShop or play online.
Searching for the update for the Nintendo Switch (specifically in .nsp format) involves navigating a mix of official legacy content and community-made "Season Patches" that keep the game current in 2026. Current Update Overview (2026) fifa 19 switch nsp update full
: Some scene releases bundle base + v1.0.1 + v1.0.2 into a single “full” NSP. Always check release notes. Nintendo aggressively monitors network traffic