There are prototypes of Bubsy games. However, there are only found for four games:
- Bubsy in Claws Encounters of the Furred Kind (1993)
- Bubsy 2 (1994), Bubsy 2 (Game Boy)
- Bubsy in Fractured Furry Tales (1994, lost)
- Bubsy 3D (1996, lost)
- Bubsy: Paws on Fire! (2019, lost)
Bubsy in Claws Encounters of the Furred Kind
There is a prototype of Bubsy in Claws Encounters of the Furred Kind, that was (according to the description of it) LESS polished than the original. The price was 799$, but no one has ever bought that.  However, there is a picture of the cartridge and the tittle screen of it.
The theory of this one is that it might have some screenshots of the prototype of this game besides the title screen. It's proven by looking threw magazines, that is mentioned and look at screenshots of the game and see, if there's any difference. One was even found in this commercial. Here are screenshots that are found so far and the comparison.
- There were two hot dogs in level 4, but there's only one hot dog in the final.
- In level 7, there was a shark, but not in the final.
- For this one, it doesn't exist in the final, because there's no way to find this place.
Interesting enough, there's another NTSC prototype of the same game (with a cartridge), that was found by Nullifidian on Ebay in 2007. It costed €199.95 (or $247.08).  There's even a PAL prototype of it. 
There's a Bubsy 2 preview prototype for Sega Genesis. Which is pretty interesting considering, that they got that only people, who previewed this game in 1994. Those were Scott Barnes, Alex V. Cabal, Harry Chavez, Dexx Dorris, Steve Fallas, Richard Gangwish, Sandy Jackson, Chris Nash, Kevin Seiter and James A. Vitales. So only 10 copies of it.
Just like before, there's a theory, that it might have some screenshots of the prototype of this game besides the title screen. It's proven by looking threw magazines, that is mentioned and look at screenshots of the game and see, if there's any difference. Here are screenshots, that are found so far and the comparison.
- The early title screen of Bubsy 2 (there's also a text: Preview copy only! 1/28/94)
- An interesting early version of this menu (interesting enough, that's from SNES, so there's a chance that the prototype of Bubsy 2 for SNES exist)
- There are three interesting screenshots of what appears to be a level of space. There are two differences: first, the background is the sky from a plane level instead of space background. And second, there is an unused sprite of a globe with a ring.
- The most interesting thing about an early version of Bubsy 2 is that it had a weapon, that it doesn't exist in the final release: a pie. However, the pie weapon is included on Bubsy 2 for Gameboy.
Bubsy 2 (Game Boy)
There is a picture of the prototype of Bubsy 2 for Game Boy, but we are not sure, how does it look like. Interestingly enough, we know the date of this prototype: 11/10/1994.
Bubsy in Fractured Furry Tales
There's a prototype of Bubsy in Fractured Furry Tales, but it's lost. However, there are some footage of it. The footage was recorded at CES (Consumer Electronics Show) in 1994. The footage was uploaded on Youtube by PS Nation in 2016 and later was found by Doctorclu. It's 41 seconds long (8:37 - 9:18).
There is another footage, that shows the game and it only played the Ali Baba level and then went to the "continue" screen to start over. But no footage of it was found yet. In the early version, the Genie looked like this:
There's also an interview of a producer of a prototype. This was also found by Doctorclu.
There's a prototype of Bubsy 3D, but it seems, that is lost. However, there is a 22 second long (2:15- 2:37) footage of early Bubsy 3D, that according to the description of this video is a "Warner Interactive games to be released in 1996, released for the 1996 E3" The footage was uploaded by barbarianbros.
Bubsy: Paws on Fire!
Unfortunately, there is no evidence, that there is a prototype of it. However, there is the footage from earlier game trailers, that the first boss was actually supposed to be Poly and Ester, the Woolie Queen. This was found by Honza 55 44 on Discord. 
|Consoles/PC||Bubsy in Claws Encounters of the Furred Kind - Yamaneko Bubsy no Daibouken - Bubsy II - Bubsy in Fractured Furry Tales - Bubsy 3D - Desert Fox Bubsy - Bubsy Two-Fur - Bubsy: The Woolies Strike Back - Bubsy: Paws on Fire!|