Shadow the Hedgehog/Unused Test Rooms

To do: Document further, using this resource here. Also, go into more detail with Stage 9900 here. Stage 6000, 8900, 9900's coli stage, 9901

Stage 0000

This test level is made of a flat surface with various areas to test physics including several paths that twist around.

The full map.

Use this Action Replay (GameCube) code and enter the second neutral level, "Glyphic Canyon":

MV02-1EH2-D6K41
BJD3-MCMF-XYHE7
JPWZ-WADQ-BMFZN
KFW9-BPHY-K1X18
UPGK-X5M1-0WQ24
HX7F-CHJG-UEUB9
YD3N-JYH1-92VPD
3PBG-XWEK-J3ACJ
G2YT-AA8Y-UMU0F
ER5K-02Y1-R7YXT
GBFY-BJUF-QMYKU
8X36-1F86-D5G5G
Y2ZY-HWFF-9DM3J
ZJKC-87VW-97Z49
6PRB-51FX-DGPP8
DV91-HE8E-HHVFZ
329N-6FBD-6FYR3

(Source: Sonic Retro)

Stage 0001

Physics testing map. Has lots of testing areas for slopes.

(Source: dreamsyntax)

Stage 0002

(Source: dreamsyntax)

Material effect testing map. Used for testing effects on bullets impacting materials and walking on materials. Has some unused material types.

Stage 0003

(Source: dreamsyntax)

Has UV Texture test geometry and a single spline.

Stage 0005

(Source: dreamsyntax)

stg0005 is loaded by all game versions during the Sky Troops intro in-game cutscene (event4201_sceneA). In most game versions the stage is actually empty.

In the GameCube version (all regions), the developers forgot to remove the original event creation stage. You can briefly see some of the test stage in the background during the event.

The stage consists of a grid. Underneath the grid there is color pallet. There is collision on this stage, with one simple flat plane for the grid and color pallet.

It is highly likely the stage was used as the base when creating the event scenes in the game.

Stage 6000

TODO: Stage 6000 details here

Stage 8900

TODO: Stage 8900 details here

Stage 9900

Stage 9900 is found only in the GameCube version and contains several oddities:

• The level uses various meshes from Sonic Heroes.
• Three unused background textures are present, with the latter two being unchanged from Sonic Heroes (even their names weren't changed)!
• Collision is only available for the first half, and doesn't even match the stage remotely. This is also the only file to use the name 9900, while other files use 0000.

(Source: sewer56lol)

An alternative video:

• stage 9900 with original BDT (chunk layering) and original skybox.
• Collision was generated, not originally left in the files. The music and objects are not found in the original, were added for demo purposes.

(Source: dreamsyntax)

Stage 9901

TODO: Stage 9901 details here