I got a controller for my Genesis because my regular controllers keep dying on me. Unfortunately, I can't get it to work with Master System games on the power base adapter. Also recently bought an NES one. Still waiting on it to arrive in the mail.
Luckily, I've already got the SNES controller and dongle for my SNES (which just really only bought to use the fight stick on it.
Speaking of which, If you like fighting games, their arcade stick is really good AND it can be easily upgraded if needed. The buttons are reprogrammable and work for most modern systems and any system that you have a dongle for (hmm... maybe I should see if Master System games work on this).
Note: I didn't know about their intent to stop selling to the US. I just bought the controllers out of need. They supposedly have another USB dongle that allows the NEOGEO controller to work with the Switch, so I might need to get it.
I dont know how many other systems I'll need replacement controllers for. I just bought another Waverbird controller for parts, and once I get my issues with my current one fixed, I dont really need another wireless Gamecube controller.
8bitdo makes really good controllers and it will be a great loss if they stop selling directly to the US. Many of their controllers have 2.4ghz options for their wireless and I prefer Bluetooth, which is what most of the cheaper wireless controllers from other companies use. I am kinda thinking of Hyperkin's NES controller because the design is MUCH more ergonomic than other NES controllers. However, if the NES dongle f
for the 8bitdo controller works with the SNES or Genesis controllers, I won't need to get it.
Edit: Lol, ok, just bought a Saturn dongle, their #2 dongle, and their Switch controller that has Hall Effect sticks and BT (which was only 30 bucks!). If the Switch controller works as intended, I'm trading in my Nintendo made one.