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Proto:Sonic & Knuckles/Sonic 3C 0408
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Contents
Introduction
An early look at Sonic & Knuckles; While the basic layout is more or less finished, there is still a lot to be implemented.
General Differences
Tails and Knuckles have incomplete super forms, since the art has yet to be made.
Cheat Codes
Level select is enabled by default, so you can just go down to 'Sound Test' at the main menu.
In the sound test, you can press the following combinations:
01, 03, 05, 07 - Enables debug mode
02, 04, 06, 08 - Get all the chaos emeralds
You can also use the following patch codes:
FFFFE2:0001 - Enable debug mode
Levels
Bonus Stages
At this point in development, they are very unfinished.

The orbs bonus stage has no collision, partially complete graphics, and a preliminary animating background. As a result, you can only really die here.
Angel Island Zone
Knuckles can go to Sonic's path. However, the boss always spawns at Knuckles' path, causing him to get stuck
Sky Sanctuary Zone
The air ducts are not active while Knuckles is going to enable the bridge.
Hidden Palace Zone
This is quite unfinished. In the hidden area, there's a Super Sonic monitor.
Doomsday Zone
It's really incomplete, only having the boss graphic and a background. As a result, the only thing you can do is fall to your death over and over again. You can use debug mode and fly over to a section with glitchy collision.