After a fair bit of trial and error, just wondering if anyone has any further pointers - could a fullscreen window (rather than just fullscreen) potentially work for this? I'm envisaging the full screen being the size of the widescreen, with the window being 4:3 - potentially the emulator would still register the hit outside of the displayed screen. I'm struggling with the Retroarch GUI options for this though.

@Efriim Thank you! This fixed it. Player 2 is not set up yet as I am waiting for the second dolphinbar to arrive from Amazon which is tomorrow :)

@BGallagherLA hello do you have a list of the lightgun games for advanced name?

@markwkidd Thanks Mark.

Here are some news regarding the subject, it's only for psx for the time being :) https://retropie.org.uk/forum/topic/23533/lightgun-support-added-to-pcsx-rearmed

problem solved, my dolphin bar is broken, only one side is lit.

Anybody tried Blue Shark (really old school ;-) ) with Dolphinbar/Wii controller ? Does it use crosshair ? It's supposed to work both in lr-mame 2003 and 2010.

The SNES ones also allow for a mouse, I think you need to set it up in the controls tab though. I've used it for Mario Paint.

@Febbweiss Hi , Anyway I can contact you in a private message or email You seem to have got something working that I was having an issue with , hope your able to help me Thank you

i have a hunch about the issue, but i can't confirm it. i've logged it with retroarch here: https://github.com/libretro/RetroArch/issues/4333 and maybe i'll buy a wiimote and sensor bar to test myself. do you know if a generic chinese wiimote will still work on the pi? i guess if they work on a wii they should be understood by the linux driver?