找了外网的解法，供参考，主要逻辑看起来大部分解法都是PAD关闭，让retroarch把pro手柄认为1P，
1 - Turn off gamepad before enter in retroarch and enter with pro controles only.
(On aroma: use gamepad standby plugin to turn off gamepad)
(On tiramisu: Stay at such a distance that the gamepad loses contact with the WiiU and turn it off when it loses connection with the WiiU due to being far away or go into settings and come back after the black screen with the speck disappears on the screen and it says wiiu menu maintain Press the gamepad power button during this time to turn off the gamepad without turning off the console.)
2 - Enter in retroparch with pro controller without gamepad power on and save config controller exit retroarch and enter again retroarch now your wiiu pro controle aways firsts.
In the first method you will not save anything, you will take advantage of the fact that the gamepad is turned off and the pro controller will be recognized as player 1 automatically in retroarch
In method 2 you will save and this will make it stay like this by default unless you change it back to what it was before.
This is the easiest method, it's simple for those who don't know how to use the control inputs or are afraid that something won't work, so they used retroarch's automatic methods to define their control.
1 - Turn off gamepad before enter in retroarch and enter with pro controles only.
(On aroma: use gamepad standby plugin to turn off gamepad)
(On tiramisu: Stay at such a distance that the gamepad loses contact with the WiiU and turn it off when it loses connection with the WiiU due to being far away or go into settings and come back after the black screen with the speck disappears on the screen and it says wiiu menu maintain Press the gamepad power button during this time to turn off the gamepad without turning off the console.)
2 - Enter in retroparch with pro controller without gamepad power on and save config controller exit retroarch and enter again retroarch now your wiiu pro controle aways firsts.
In the first method you will not save anything, you will take advantage of the fact that the gamepad is turned off and the pro controller will be recognized as player 1 automatically in retroarch
In method 2 you will save and this will make it stay like this by default unless you change it back to what it was before.
This is the easiest method, it's simple for those who don't know how to use the control inputs or are afraid that something won't work, so they used retroarch's automatic methods to define their control.
