Nintendo hat Update 1.1 für ARMS veröffentlicht, das u.a. einen Spectator-Modus ergänzt. Die kompletten Pacthnotes lesen sich folgendermaßen:

• “LAN Play” support added. You can now battle against players via LAN. On the Top Menu, click and hold the Left Stick and then press L+R to switch between “Local” and “LAN Play”
• ”Arena Mode” added. This mode focuses on serious 1-on-1 matches and can be played via “Friends,””Local,” or “LAN Play.” Up to 4 players can be in the arena, and players not currently fighting watch as spectators
• Fixed issue where Kid Cobra was able to repeatedly do a charge dash while riding snake boards
• Fixed issue where Barq would warp a great distance away after Byte & Barq perform a rush attack while on a snake board
• Fixed issue where ARMs such as the Chakram would pass through the purple light boxes in the Ribbon Ring stage
• Fixed issue where Biff referred to the “ARMS Grand Prix” as the “AMRS Grand Prix”