Sonic the Hedgehog Mobile

Sonic the Hedgehog Mobile
Also known as: Sonic the Hedgehog Part 1, Sonic the Hedgehog Part 2 (IFone; US/EU), Sonic the Hedgehog (JP) Based on: Sonic the Hedgehog (Genesis) Developers: Sonic Team, iFone (US/EU only) Publishers: Sega (JP), Sega Mobile (US/EU) Platforms: J2ME (US/EU), I-Mode (JP) Released in JP: December 5, 2005 (Sonic Cafe) Released in US: December 20, 2005 Released in EU: February 14, 2006 This game has unused graphics. This game has debugging material. This game has regional differences. This game has revisional differences.

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Sonic 1 on a mobile phone before the iPhone port. Originally released through the Japan-only Sonic Cafe service (for I-Mode devices) and later ported to J2ME. Depending on the service provider, the game was either provided as one full game or in two parts.

It seems this version served as the basis for the Game Boy Advance port, Sonic the Hedgehog Genesis, which is generally considered to be the worst port of Sonic 1.

To do: More regional differences.

Unused Graphics

This UFO was seen in early screenshots and footage of the Genesis original's Marble Zone, but why is it here...?

(Source: Sonic Retro)

Leftover graphics from the removed Special Stage remain in the data.

Cheat Menu

At the title screen, press 2, 3, 0, 6, 9, 1 (23/06/91, the US/European release date of the original game) to unlock the cheat menu.

• INVINCIBILITY - Makes you invincible.
• UNLOCK LEVELS (Part 1 only) - Allows you to play all of the levels from Part 1 and Part 2. This option doesn't exist in the Japanese release, as it wasn't released as two separate games in Japan.
• AMPHIBIOUS (Part 2 and Japanese release only) - Makes it impossible to drown.
• EMERALDS - Allows you to set the amount of Chaos Emeralds you have.
• FPS - Shows the current number of frames-per-second in the upper-left corner of the screen.
• COORDS - Shows Sonic's coordinates in the upper-right corner of the screen.
• CAMERA - Lets Sonic move in all directions without falling. Use # to toggle it mid-level.

Revisional Differences

There was a second release of the game for Verizon phones that strangely removed all of the sound effects.

(Source: Sonic Retro)