GitHub - kwsch/pkNX: Pokémon (Nintendo Switch) ROM Editor & Randomizer

It's apparently easy to load your own Roms into the Switch official NES app

Nintendo 64™ - Nintendo Switch Online - Nintendo Official Site

Nintendo Switch ROMs (NSP, XCI) for Yuzu, Egg NS, etc.

Installing Yuzu Emulator On Steam Deck (The Easy Way)

Switch Limited Run #198: Castlevania Advance Collection – Limited Run Games

How to play Game Boy Advance games on the Nintendo Switch

Mario + Rabbids Kingdom Battle - Nintendo Switch Game - Excellent Condition

The best games on Nintendo Switch Online + Expansion Pack - Polygon

Orzly Accessory Bundle Kit Designed for Nintendo Switch Accessories Geeks and OLED Console Users Case and Screen Protector, Joycon Grips and Wheels

Nintendo Switch Online - Every NES, SNES, N64, Sega Genesis, Game Boy, And GBA Game Available