That being said, you should try one of the other MAME emulators - Mame2003 has mouse support and RetroArch seems to detect your mouse. As a plus, it supports absolute pointing devices.

@ironsocks

retropie 4b 8gb
sd image made from retropie.org
retropie 4.7

***I am using an oem nintendo wii sensor bar that was modded to work in a standard usb A ports and NOT a Dolphin bar. This was done by cutting off the wii proprietary connector and soldering the wires into a usb A connector as well as removing 4 LEDs out of ten to bring the voltage down to under 5v. It works perfectly fine for wiimote tracking.

Almost all the guide I see for using wiimotes in lightgun games such as duck hunt use a dolphin bar and not a standard wii sensor bar. why am i using an oem sensor bar? because the dolphin bar went way up in price after the tariff war with china, and I have quite a few oem wii sensor bars so why not.

Have you figured this out yet? Using wminput method I was able to get the wiimote to work as a mouse tilt wiimote up and down side to side left mouse button mapped to wiimote button b and right mouse button mapped to wiimote button a. the other buttons and d pad on the wiimote are mapped to keyboard keys. No thanx to the guide I followed which you referenced here with the 3 different methods on it.

You have to read up on the wminput github page as to how to get the wiimote to map as a mouse/keybpard vs a joystick. You need to use Plugin.acc.X = REL_X
Plugin.acc.Y = REL_Y and map at least a left mouse button to a wiimote button. This turns the wiimote into a mouse/keyboard configuration and this works in lxde in the Retropie menu and in the retroarch menu in game but wont work as a controller or mouse to use in games such as duck hunt.

I could also use the motion/tilt as a joystick input using Plugin.ir_ptr.X = ~ABS_X and Plugin.ir_ptr.Y = ~ABS_Y in the wii button mapping config file. This works in retropie menu and in the retorarch menu as well as being able to somewhat control a game in an emulator BUT still doesnt work as a pointer or mouse in duck hunt. So you still can't use it as a shooting device.

I have tried a couple different new emulators along with different configurations in retroarch to try to get this wiimote to work as a mouse in the duck hunt game. It works fine everywhere else as mentioned but not in the game. This is so frustrating.

I was somewhat deceptive in my question gathering as I think this is entirely unrelated to the sixaxishelper, as I haven't actually gotten to use the wii controller until now.

I have tried removing and syncing the devices from bluetooth config menu and also bluetoothctlthey sync just fine.

/proc/bus/input/devices lots of things.
Logitech* AnywhereMX & K350 & K400
Sony Playstation(r)3* Controller & Motion Sensors
Nintendo Wii Remote* Accelerometer & IR & _Remote & Motion Plus (lists 4 inputs)

So my question could have been is the Wii Motion Plus incompatible? I searched the forums but I ignored that they go on and on without answers.
It syncs fine, and the jstest buttons respond, it is some mapping overlay, but also there is this Traceback in joy2key. It is very close to working. But very close could be miles, underground.

I have a hundred tabs open and a link to this was broken, will go here https://github.com/retropie/retropie-setup/wiki/Wiimote-Controller
and hopefully it will work.

I would be surprised if this was successfully done by someone. The video for the screen is streamed over a proprietary 5 GHz radio. A gentleman in a previous post said it's based on 802.11n and he could very well be right. Still I think it may be possible through a custom USB adapter of some kind, though the 480mbps throughput limit may turn out to be a constraint, not sure. Is it possible? I believe so yes. Is it something easy to do, almost certainly not. You would probably need to find an engineer to design a custom USB adapter to communicate with the pad.

The USB port on the Wii U pro controller is just a charging port and doesn't do data. If you want to connect to the Pi via bluetooth you'll have to go into the bluetooth settings of the RetroPie. While you can get this to work, I highly suggest you get a PC wireless controller adapter. I tried hooking my Wii U controller to the Pi's bluetooth and it worked at first. But very soon I started experiencing ghosting to the point I couldn't even play the games. Using the adapter, I synced it very easily to my controller and Emulation Station recognized the controller very easily.

I know for my Wii U controller, I couldn't get RetroArch hotkey shortcuts to work as I wanted until I went into the config file and manually added the start button as the "exit" button. But it took me awhile at first to understand how the hotkeys worked (didn't know what hotkey option meant when I set up the controller in emulation station because it didn't do that in my Reys image).