If flashing your SD Card using RPI Imager, do not alter any settings or attempt to alter any WIFI settings through the RPI Imager options. Connect to your WIFI after flashing the image throught the Retropie menu
All images for the Zega Mame Gear can be found on the Download area of the Zega Mame Gear page
Raspberry Pi Zero
Raspberry Pi Zero 2
Raspberry Pi 3A+
Raspberry Pi CM4