“Trimmed” NSPs or XCIs for this title—they break co-op functionality. Use NSC_Builder to check your file integrity.

The 1.0.5 update serves as a critical bridge for players using the cartridge version, which typically ships at version 1.0.0. This specific update addresses several early performance hurdles:

: Base resolution has been increased for portable mode .

Do install the update before the base game.