Updated on January 14: This article's original Discord server link, incorrectly labeled "Nintendo Switch 2," has been updated to reflect the correct source of the datamining information.
Summary
Rumors suggest the Nintendo Switch 2's additional "C" button may facilitate chat functionality. Recent datamining reveals a potential group and voice chat feature, codenamed "Campus," within the latest Switch OS. The official Nintendo Switch 2 reveal is expected on January 16th.
Reports indicate the Nintendo Switch 2's rumored "C" button might be dedicated to chat functions. This could resolve a significant mystery surrounding the new console's hardware.
Since late 2024, numerous leaks have surfaced regarding the Switch 2, likely due to its entry into mass production. These leaks consistently show an extra button—a dark gray "C"—on the right Joy-Con, below the home button. However, its purpose remained unknown until now.
Datamining of the latest Switch OS, from a growing Discord server focused on Switch 2 information, points to a feature codenamed "Campus." This appears to be group and voice chat support for Nintendo Switch Online subscribers.
Nintendo Switch 2: Screen Sharing Capabilities

The same source suggests "Campus" will include screen sharing for groups of up to 12 users. While the codename starts with "C," if linked to the new button, it's more likely the "C" represents "chat" rather than "Campus." This counters the popular theory that the button would be used for screen casting.
Chat Support and the Switch's Kid-Friendly Design
Group and voice chats necessitate internet connectivity, likely restricting them to Nintendo Switch Online subscribers. This is significant, given the Switch's deliberate design to minimize such features, prioritizing a more kid-friendly experience. Reintroducing features like text chat could raise concerns Nintendo may wish to avoid.
The existence and function of the "C" button, along with other Switch 2 details, may be revealed soon. Multiple sources point to an official announcement this Thursday, January 16th.