At the launch of Nintendo Switch Online app, software updates will be made available for several popular games to provide support for voice chat via the app, including:
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Mario Kart 8 Deluxe
Mario Tennis Aces
MARVEL ULTIMATE ALLIANCE 3: The Black Order
Mortal Kombat 11
Red Faction Guerrilla Re-Mars-tered
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Skulls of the Shogun: Bone-A-Fide Edition
Super Mario Party
Super Smash Bros. Ultimate
TT Isle of Man
Additionally, the entire Nintendo Entertainment System - Nintendo Switch Online game library supports voice chat using the Nintendo Switch Online app.
An active Nintendo Switch Online Membership is required to use the online features for most titles.