The Vision Pro got its first Virtual Boy emulator in an app called VirtualFriend, finally giving me, a person with an irrational love for Nintendo's shortest console, the chance to play it again in immersive 3D. The app is also available for iOS and iPadOS, where it's a virtually identical experience, minus the 3D effect.
The first games I played after downloading VirtualFriend were the ones I owned as a kid: Red Alert, Wario Landand Mario's Tennis. I'm pleased to say that apart from some minor audio glitches in the Red alarmgames run fine — everything is as I remember.
VirtualFriend supports Bluetooth controllers and keyboard control on the Vision Pro, as well as touchscreen buttons if you're playing on an iPhone or iPad. Visually, the games look as good as a Virtual Boy game can, and get a little help from the app, which lets you customize the console's two-tone color palette. VirtualFriend also has an eye adjustment slider that helps adjust the image if you find that a certain game isn't working for you.
The main features missing are controller mapping and the ability to save the game at any time using save states. (Developer Adam Gastineau acknowledged the latter in an open issue on the project's GitHub page.)
However, VirtualFriend is easy to recommend if you're curious about playing Virtual Boy games or, like me, once owned and loved the console. It's free, with the option to tip the developer, doesn't display ads, and according to the App Store listing, won't collect your data. It's just good, clean, mid-90s VR fun.