Ensure your firmware/SIG patches are up to date for compatibility.
This file appears to be a compressed Nintendo Switch ROM (NSP) for the game . [NSW] Pompom: The Great Space Rescue File Name: Pompom [0100114016750800][v65536][US].nsp.rar Game Info: Title ID: 0100114016750800 Version: v65536 (Base Game) Region: USA Format: NSP (within RAR) Platform: Nintendo Switch Pompom [0100114016750800][v65536][US].nsp.rar
Install via your preferred manager (DBI, Tinfoil, or Awoo Installer). Ensure your firmware/SIG patches are up to date