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Proto:Sonic & Knuckles/Sonic 3C 0408
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An early look at Sonic & Knuckles; While the basic layout is more or less finished, there is still a lot to be implemented. Lots of glitches and differences are abound.
Contents
General Differences
Tails and Knuckles have incomplete super forms, since the art has yet to be made. Likewise, Hyper Sonic is not in the game yet.
The ending sequences have yet to be implemented.
No special stage rings have been implemented in the S&K zones.
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.
File:Sonic3c408bonusstage2.png
The slot machine bonus stage has more rings, no goal signs, and a static background.
Angel Island Zone
Knuckles can go to Sonic's path. However, the boss always spawns at Knuckles' path, causing him to get stuck.
Flying Battery Zone
Several sound effects are absent.
Lava Reef Zone
Act 2 is a bit incomplete, since the palette has yet to be changed to indicate a freeze-over.
Sky Sanctuary Zone
The air ducts are not active while Knuckles is going to enable the bridge. There seems to palette conflicts
Hidden Palace Zone
This is quite unfinished. It does not play its unique music, but Sky Sanctuary's. The player also does not run in. 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.