Nintendo employs sophisticated telemetry to detect unauthorized software modifications. If you install a pirated NSP file and connect your console to the internet, Nintendo's servers can flag the discrepancy in your system logs. This generally results in a permanent hardware ban (Error Code 2124-4007 or 2124-4508), preventing the console from ever accessing the eShop, playing online multiplayer games, or downloading legitimate system updates. 2. Malware and Security Threats
Many sites offering "free" games bundle them with malware, ransomware, or spyware.
With that disclaimer established, here is a comprehensive look at Dr. Kawashima’s Brain Training for Nintendo Switch , its NSP file context, and everything a user should know before searching for it online.