What’s the best way to play this on pocket? Just got mine and was hoping to play there.
There are two main options right now:
1. Download the OpenFPGA core that lets you play GB games, and then put the ROM on the SD card with the core. Google a program called Pocket Updater to make the setup easy.
2. Use an Everdrive or similar flash cart if you have one.
Either will work, but for now method #2 has the advantage because you can make use of display settings that are unavailable in the core (will be coming in the future).
Weird. I do not have Windows 11 so I don't know how that's different, but do you have your view settings to show file extensions? IIRC, Windows by default turns that off, meaning that if you rename the file and ad ".gbc" it'll instead technically be "[name of game].gbc.gb," which may cause whatever emulator to still read it as a .gb file instead.
As for myself, I tested both the demo and the rev A rom by swapping the extension to .gbc on Windows 10, and it works perfectly with color on my EZ-Flash Jr. flash cart, played on my GBA SP.