Hyperkin cheaped out by not up-volting. What a shame. But you may be onto something. This adapter could be upvolting to 5. The old version w-005 worked with the NES advantage and capcom power stick. People are saying this in the reviews on amazon: https://www.amazon.com/Mayflash-NES-SNES-Controller-Adapter/dp/B00B2K0C8M/ref=cm_cr_arp_d_product_top?ie=UTF8
I mispoke. I actually have the Mayflash one (https://www.amazon.com/Mayflash-NES-SNES-Controller-Adapter/dp/B00B2K0C8M). I looked at the Hyperkin one, but went with the Mayflash one because I am lazy and didn't want to have to switch between NES and SNES controllers when playing games on the NES mini (after hacking it).
Thanks for the info. I just ordered one of these this morning to use my NES Advantage on the classic but it sounds like my plan isn't going to work. At least I can still use it with the original controllers.
I wonder why the NES Advantage doesn't work? I thought it used the same controller signals as the standard controllers so I figured it would just work. Maybe it needs more power for the extra features (turbo, slow)?
I wonder if these would work with the Advantage?