Sonic the Hedgehog Genesis, referring to itself as simply Sonic the Hedgehog on the title screen, is a Game Boy Advance port of Sonic the Hedgehog, originally released for the Sega Genesis. It was released in November 2006 exclusively in North America to celebrate the Sonic the Hedgehog series' (and the original game's) 15th anniversary. There are several differences from the original game.


Spoiler warning: Plot, ending details or any kind of information follow.

The title screen of Sonic the Hedgehog Genesis.

Like in the original game, Dr. Ivo Robotnik (AKA Dr. Eggman) has invaded South Island to collect the six Chaos Emeralds and conquer the world with them. He also started kidnapping the local Animals on the island to turn them into evil robots.[1] However, the doctor was stopped by Sonic the Hedgehog, who collected the Chaos Emeralds before he did, saved the Animals, and, eventually, restored peace to South Island.


Sonic in Green Hill Zone, the first Zone in the game.

Trying to emulate the physics of the original Sonic the Hedgehog game, Sonic the Hedgehog Genesis is a 2D side-scrolling platform video game. As with the original game, the only playable character here is Sonic the Hedgehog. The game also uses an autosave feature that saves the player's progress at certain points.

Like in the original game, Sonic the Hedgehog Genesis is divided into seven Zones, all of which have three Acts each with a battle against Dr. Eggman at the end of the third Act (with the exception of Final Zone, which is a single, short Act).


Button formation Movement
Controlpadds.png left/right Walk/run[2][3]
Controlpadds.png up Look up[2][3]
Controlpadds.png down Look down[2][3]
GameboyA.png/GameboyB.png Spin Jump[2]
Controlpadds.png down + GameboyA.png/GameboyB.png Charge Spin Dash[2][3]
(Anniversary Mode only)
Controlpadds.png left/right + Controlpadds.png down Spin Attack[2][3]
START Pause game[2]


  • Due to the screen size in the Game Boy Advance, the screen ratio has been changed from 330x224 in the original version to 240x160.
    • The title screen had to be re-drawn due to this issue. In compensation however, the text "PRESS START", originally removed in the original version, was added.
  • The title cards have been redrawn. They are also much longer than in the original version.
  • All horizontal Springs are now drawn upside down.
  • Sonic's normal death animation is only shown for a split second. Later, the drown animation is shown instead.
  • The music and some sound effects were slightly modified, with some of them being completely missing, along with some sprites and textures.
  • The game experiences significant lag and the frame-rate quality is poor.
  • The Debug Mode is now completely removed.
  • If the player quits the game without getting a Game Over, retrying can be selected at the menu screen so that the player can continue the game with any Chaos Emeralds and score, and the player will start on the Act they left off on.
  • Most bosses (specially the Egg Mobile-H in Green Hill Zone) can be easier to defeat since the player can bounce of top of Dr. Eggman and hit him many times in a row.
  • Most of the time, Goal Plates will not be centered when passed through them, and the camera position sometimes will not change, revealing an empty space under the ground.
  • Most items can be seen floating or wedged into the ground.
  • In Labyrinth Zone and Scrap Brain Zone Act 3, the water does not affect the life HUD. Sonic also has a different color palette underwater, and objects are lighter than in the original version.
  • Beating the game with all six Chaos Emeralds collected will not fill Green Hill Zone with flowers.
  • Unlike in the original version, all Switches in Labyrinth Zone and Scrap Brain Zone have the same aspect as those in Marble Zone.
  • In the Final Zone, the spark balls are produced a bit slower and more orderly. Also they remain solid and flashing all the time instead of flashing with an electrical ring of energy before descending. The spark balls are also lethal at any given time when they are on-screen (in the Genesis version, the spark balls were only lethal when they were descending).


Sonic the Hedgehog Genesis features four different modes, which can be chosen while on the title screen. These are:

Original Mode

Original Mode[4] is the standard mode of the game, with the same gameplay as that from the original Sonic the Hedgehog.

Anniversary Mode

Anniversary Mode[4] is the same as Original Mode, but with the Spin Dash from Sonic the Hedgehog 2 added.

Juke Box

The Juke Box allows the player to play different soundtracks and sound effects from the game. It is unlocked after completing the game with all Chaos Emeralds collected.


Options[4] is the settings menu for Sonic the Hedgehog Genesis, which features the following settings:

  • SE:[4] Turn ON or OFF the sound effects from the game.
  • BGM:[4] Turn ON or OFF the background music from the game.


Sonic the Hedgehog Genesis was universally panned by critics and gamers alike. Some of the most heavily criticized aspects include the extremely choppy framerate, poorly emulated physics, awful remixes of the music and the unbelievable number of bugs and glitches.[5]


  • This marks the final Sonic game on the Game Boy Advance.
  • This is the only Sonic game that was exclusive to North America.
  • The colors on the front box artwork have been edited to be much lighter than the original artwork, mainly on Sonic's body.
  • This is the second Sonic game on the Game Boy Advance to be a reissue, with the first being Sonic the Hedgehog Spinball, featured in Sega Smash Pack.


Box artwork


  1. Sonic the Hedgehog Genesis (Game Boy Advance), United States instruction manual, pg. 4.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Sonic the Hedgehog Genesis (Game Boy Advance), United States instruction manual, pg. 5.
  3. 3.0 3.1 3.2 3.3 3.4 Sonic the Hedgehog Genesis (Game Boy Advance), United States instruction manual, pg. 6.
  4. 4.0 4.1 4.2 4.3 4.4 Sonic the Hedgehog Genesis (Game Boy Advance), United States instruction manual, pg. 7.
  5. Provo, Frank (20 November 2006). Sonic the Hedgehog Genesis Review. GameSpot. Archived from the original on 9 June 2019.

Sonic the Hedgehog handheld games
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