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Proto:Sonic Rush

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This page details one or more prototype versions of Sonic Rush.

The E3 2005 demo of Sonic Rush allows playing of an early version of Zone 1 Act 2, followed by the first boss battle. Only Sonic is playable.



  • There is no character select.
  • A "Coming Soon" screen appears after a set amount of time or after finishing the boss battle.


  • You can boost in mid-air. This ability is available in the DS version of Sonic Colours which uses the same engine as Sonic Rush.
  • The Boost meter can be refilled by running.
  • Boosting into the large Eggman wheel doesn't kill Sonic, he simply passes through.
  • Sonic doesn't dance when tapped on the touch screen.

Boss Fight

  • No cutscenes play.
  • The Egg Hammer Mega takes only four hits to destroy. Two hits initiate the second phase.
  • The rolling head move is harder to dodge and doesn't have a "double" version.
  • The boss fight takes place on the Bottom Screen, and the other screen constantly shows the Sonic Rush logo, instead of the bottom screen showing Tails and the bosses' health, like in the final version.

Bug Fixes

A few bugs were fixed by the final:

  • When Sonic runs on slopes or jumps on bumpers, his model rotates incorrectly, often with his head down.
  • The infamous vertical standing glitch from Sonic the Hedgehog Genesis and Sonic 4 Episode I is very easy to perform in the demo, especially on loops.
  • The physics engine is slightly unfinished, and it is possible to get stuck when jumping against a wall until the momentum runs out.



The icon that would display on the DS menu, has a three pixel difference in Sonic's eyes.


Prototype Final
Sonic Rush-Proto E3 2005-Title.png Sonic Rush-title.png

The stripes appear on the top and bottom and have a 3D look to them. The background is a hexagonal pattern on a white background. The copyright text uses a different font and says "(C) 2005,Sega" instead of "(C) Sega Corporation, 2005". The start button uses a different font and style.

Boss Battle

  • The camera angle before the player gets control of Sonic is different.



The background music is similar to the music used for the Sonic Advance games, as opposed to the pop-inspired ones used in the final. All of the prototype's music was composed by Teruhiko Nakagawa, whereas most of the music in the final was composed by Hideki Naganuma.

Title Screen

Leaf Storm

The Zone 1 theme used in the proto is very similar to Blaze Appears albeit longer, whereas the final uses a completely different theme.

Boss Battle


The main part sounds quite similar to the track "True Area 53" from Sonic Advance 2, which was composed by Hideki Naganuma. The second variant, which plays after you hit the boss enough times, has a slightly faster tempo and more instruments that play a jingle reminiscent of the Zone 1 music.

Results Screen

Sound Effects

The demo recycles voice clips from Sonic Advance 3, when Sonic was still voiced by Ryan Drummond.


To do:
Upload the maps.

Placeholder files for all seven zones (Acts 1 and 2) from the final are present, but most are blank and unplayable except Leaf Storm Act 1, Leaf Storm Act 2 (which is normally available), Water Palace Act 1, and Dead Line Act 1.

  • Leaf Storm Act 1 & 2: The most complete stage (along with Act 2 and the Leaf Storm Boss), with some differences from the final.
  • Water Palace Act 1: Incomplete, but playable.
  • Dead Line Act 1: Impossible to finish, with mostly garbled graphics.

Unused Sound Effect

Unused Sprites

To do:
How do you perform the glitch? Does it work in the final game? Rip the sprites and compare with the ones used in the final's credits.

Sprites for Sonic and the Akatento badnik from Sonic Advance 3 can be found in the overlay files. These can be seen in-game by exploiting a camera glitch that causes Sonic's model to disappear.

sonic advance sprite found in-game.