From Sonic Retro
TV Previews
| # | Snapshot | Description | Conclusion
|
| T01
|
| An Nick Arcade episode featured a prototype version of Sonic 2. Weird things about it include Star Light music when playing Emerald Hill, missing Tails, a missing building in Chemical Plant, and weird zone layouts.
| Earlier prototype
|
| T02
|
| Captured from a VHS cassette that came with an issue of Mean Machines Sega. Part of the video exposes the bugs in various levels in Sonic 2 prototype.
| Newer prototype
|
| T03
|
| A Spanish video showing final Sonic 2 sprites in prototype levels such as Hidden Palace.
| Newer prototype
|
The videos provide a lot of information, and allow us to put together a timeline showing which prototypes are older and which are newer.