Knuckles in Sonic 3 - S&K Collection (reuploaded)

Reuploaded with camstudio in much better quality (credit to MadnessHacks for the suggestion).
Now with in-game sound! =-)
Note this is not Sonic & Knuckles locked-on w/Sonic 3, but the PC compilation of Sonic 3, Sonic & Knuckles, and the locked-on game called Sonic & Knuckles Collection.

By the way, the Knuckles save file on the right of Sonic's is thanks to a savegame editor, but that's not the point of the video.

How to do it:

*With any character, enter Angel Island, jump onto a swinging vine and press left, left, left, right, right, right, up, up, up. Reset the game with ALT+R, and you should see a menu called "Sound Test" under the Competition Menu.
*Press Enter/Return to enter it. Select "Special Stage 1".
*Now you're at the Special Stage game. Press down to highlight the Code option. Do with it what you will, but press whatever button is mapped to "Rolling Jump" when you're done. This changes the star on the sphere from blue (Sonic) to red (Knuckles). (You can come back to this screen at any time to swap between these two without losing Chaos Emerald data, but never Tails.)
*Press ALT+R to reset the game again.
*This step is VITAL. Go back to the Sound Test menu. Entering the 1P menu will overwrite the character that is "currently stored" (which is Knuckles) with whoever is on the savegame file. So go back to Sound Test, like I said.
*Pick your favorite zone and enjoy!

** WHY IT HAPPENS **
Sonicmike2 explained that Sonic & Knuckles Collection is essentially Sonic 3 & Knuckles, but can run as either Sonic 3, Sonic & Knuckles, or the full game.

"The code is shared between the three games, whereas Sonic 3 on the Genesis is a separate ROM with its own code and data."

In other words, in Sonic 3A PC, the S(3)&K data is active, except in menus and S3 levels (but not necessarily accessible) while in Sonic 3A MD, the S(3)&K data is mainly inactive. Because Knuckles is stored in the random-access memory once the sphere is changed to red, it enables you to play as him if the game doesn't change the character data.
Note that because the game loads S3A layouts while running as S3A, some levels can't be beaten as Knuckles. (For example, at the end of the video.) But at the same time Knuckles can get to Sonic-exclusive areas he couldn't in S3&K (or if he could, the requirements are harsher in the latter).

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[VERBATIME1]

hey tell what are Buttom of s&K pc collection I cant edit it

Yes I know there is How change controler but the is online for Jump and arrow key

[SuperSonicRider9000]

@VERBATIME1 Huh?

[MadnessHacks]

See?

Anyway, I see potential in you, Keep up the good work!

[SuperSonicRider9000]

Thanks! The hack you're working on is looking pretty awesome as well.

[Ferrari8Boo]

@rinaldiproduction6 Download the patch, search it on google or whatever you use.

[rinaldiproduction6]

my sonic and knuckles collection gos hyper fast

[MadnessHacks]

Heh, I'm always welcoming some criticism on it, since it needs a bit of a touch-up.