Just tried this out and looks like it will work
There's this <$4 wireless SNES controller on Amazon: https://www.amazon.com/gp/product/B07BT3QRT3?th=1
Looked like Nunchuk connector to me, so I tried it out and appears to work...
Adapted Jon's code just a bit from here to show binary data: https://forums.parallax.com/discussion/130118/wireless-nunchuck-it-works
The data is a bit strange, but each button does affect at least one bit. But, some affect 4-bits and some 8-bits, so it's a bit weird.
Fun puzzle to solve. Definitely looks solvable though...
Planning on including 2 of these connectors on my first P2 board so can play multiplayer games with wireless controllers