Nintendo Switch already has a model for voice chat in a 3DS game
Amazon.com: Bluetooth Adapter for Nintendo Switch Accessories USB-C Connector Wireless Audio Transmitter with aptX LL, Support in-Game Voice Chat,Connect AirPods Headphones - White&Red : Video Games
How to Use Pictochat on a Nintendo Ds Lite: 10 Steps
Why Doesn't the Switch Have Native Voice-Chat? - Destructoid - Nintendo
Why The Nintendo Switch's Voice Chat Is Done Through Mobile | Cinemablend
Pictochat Picto Chat Nintendo DS Gameboy Instruction Manual Only | eBay
Nintendo Switch Online app's voice chat is already turning people off - Polygon
How to Contact Nintendo Customer Support thru Chat / Phone / Text? - YouTube
Enter and exit a Chat Room | Nintendo DSi (XL) | Support | Nintendo
Nintendo Switch Online: How Has the Voice Chat Issue Not Been Addressed? – Okay, Cool
3DS Does Not Feature a Messaging System - News - Nintendo World Report
Chat-A-Lot Review (3DS eShop) | Nintendo Life
Contact Us | Contact | Support | Nintendo
Enter and exit a Chat Room | Nintendo DSi (XL) | Support | Nintendo
List of messaging applications for Nintendo game consoles - Wikipedia
PictoChat | Nintendo | Fandom
How to Use Pictochat on a Nintendo Ds Lite: 10 Steps
Nintendo DS Doing PictoChat - YouTube
Amazon.com: HomeSpot Pro Switch Bluetooth Adapter, Audio Chat Mixer for Streaming Switch & Smartphone or PC Audio, Spotify, Discord, Voice Call to Bluetooth Headphones, with aptX Low Latency and Built-in Mic :
A Third Party's Look At The Nintendo Switch's Phone-Based Voice Chat Is A Technological Monstrosity