It’s a Genesis 1 with a 32X with Sonic & Knuckles in the cartridge slot. That game had a flip-top with a cartridge slot under it so other games (specifically Sonic 3) could be plugged into it for additional functionality. The Genesis 1 also had a connector on the side which was used to connect to the Sega CD unit (notably missing from this picture). It’s a 30-pin connector so it fits into the 32-pin cartridge slot. And then plugged into the top Genesis is a copy of Bubsy, one of the worst games released for the system.
As to whether it “works”, at best you would get Sonic & Knuckles booting as long as the Genesis plugged into it doesn’t connect to or short any pins in the cartridge’s slot.
a copy of Bubsy, one of the worst games released for the system.
Leave Bubsy alone, please!
Leave Bubsy alone right now! I mean it.
Anyone that has a problem with him, you deal with me, because he is not well right now.
Leave him alone.
I was working at Babbage’s when Bubsy was released for the SNES and Genesis. Accolade (the publisher) had somehow convinced upper management that it was going to be a huge hit so they shipped us three or four cases of the game for each system. We rarely got cases, usually half-a-dozen loose copies. So we crammed them into our tiny back room and they sat there for months. I’m not going to say we didn’t sell any, but I certainly don’t remember it flying off the shelves. At one point a guy claiming to be an Accolade exec came into my store asking how it was selling. Again, I don’t remember exactly what I said to him but he wouldn’t have been happy. Finally, after a year or so we got orders from HQ to box them up and send them back.
It’s a Genesis 1 with a 32X with Sonic & Knuckles in the cartridge slot. That game had a flip-top with a cartridge slot under it so other games (specifically Sonic 3) could be plugged into it for additional functionality. The Genesis 1 also had a connector on the side which was used to connect to the Sega CD unit (notably missing from this picture). It’s a 30-pin connector so it fits into the 32-pin cartridge slot. And then plugged into the top Genesis is a copy of Bubsy, one of the worst games released for the system.
As to whether it “works”, at best you would get Sonic & Knuckles booting as long as the Genesis plugged into it doesn’t connect to or short any pins in the cartridge’s slot.
Leave Bubsy alone, please!

Leave Bubsy alone right now! I mean it.
Anyone that has a problem with him, you deal with me, because he is not well right now.
Leave him alone.
I was working at Babbage’s when Bubsy was released for the SNES and Genesis. Accolade (the publisher) had somehow convinced upper management that it was going to be a huge hit so they shipped us three or four cases of the game for each system. We rarely got cases, usually half-a-dozen loose copies. So we crammed them into our tiny back room and they sat there for months. I’m not going to say we didn’t sell any, but I certainly don’t remember it flying off the shelves. At one point a guy claiming to be an Accolade exec came into my store asking how it was selling. Again, I don’t remember exactly what I said to him but he wouldn’t have been happy. Finally, after a year or so we got orders from HQ to box them up and send them back.
this guy adapts
The hero we need, but don’t deserve! Thank you!!
I feel dumb, I don’t remember a side slot on my genesis 1. It was quite a while ago, but still.
It was under a removable panel. If you didn’t have a Sega CD, you probably didn’t have a good reason to go looking for it.
It was concealed by a plastic cover which blended in to the rest of the console. It was easy to overlook unless you went looking for it.