Family Trainer games do not recognize mats. It reacts only by putting "mat in" on port 1 but of course you can't do anything with the controller!
I use the Gamecube adapter for Wii U / PC from Mayflash
I use the Gamecube adapter for Wii U / PC from Mayflash
CPU: AMD Ryzen 5 2400G, GPU : Radeon RX Vega 11 (integrated), RAM: 2x16GB G.SKILL Trident Z Neo DDR4-3600
OS: Windows 10 Pro 21H2 x64, Dolphin Dev
Controllers :
2 Wiimote MotionPlus Inside, 2 Wiimote + Motion Plus, 4 Nunchuck, Wii Balance Board, 1 Dance Mat, 1 Dance Mat Duo (Family Trainer), 2 Microphone U-SING
Dolphinbar (Mayflash), GameCube Controller Adapter 4 ports for PC/Wii U (Mayflash)
OS: Windows 10 Pro 21H2 x64, Dolphin Dev
Controllers :
2 Wiimote MotionPlus Inside, 2 Wiimote + Motion Plus, 4 Nunchuck, Wii Balance Board, 1 Dance Mat, 1 Dance Mat Duo (Family Trainer), 2 Microphone U-SING
Dolphinbar (Mayflash), GameCube Controller Adapter 4 ports for PC/Wii U (Mayflash)