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Sonic the Hedgehog is an unlicensed game for the SNES by Peruvian scene organization Twin Eagles Group. It was released in cartridge form with their permission[1], and some later cartridges of the game call it Sonic the Hedgehog 4 or Sonic & Knuckles. It is a hack of Speedy Gonzales: Los Gatos Bandidos.


Sonic the Hedgehog (SNES) Gameplay

Sonic The Hedgehog's gameplay. Note the imprisoned Mario and the glitched background.

The hack replaces Speedy Gonzales with Sonic, and the imprisoned mice, who work as checkpoints, with Mario. There is some voice acting in this hack, recorded by the hackers themselves to replace the voices in the original game; the trapped Mario checkpoints exclaim "Mario!" when rescued, and Sonic yells "Sonic, Sonic!" when he picks up the speed shoes. The cheese pieces have been replaced with rings, although Sonic has a health meter as indicated by the hearts at the bottom left of the screen. Sonic's sprites are from Sonic The Hedgehog 2 on the Sega Mega Drive, except for his handling sprites, which are from Sonic The Hedgehog 3.

The backgrounds are glitched, being rendered in a red gradient with a disjointed look, although they show up normally during boss fights. The level order has also been altered, as the forest (the second stage in the original game) is now the first stage, followed by a castle, and what appears to be a futuristic spaceship. The game can crash on the third level after hitting a switch (which is also present in the original game if played on some emulators) although it can be bypassed. After a level is completed, a running Sonic with a glitchy palette (probably Speedy Gonzales') appears on the screen and the score is calculated. Unlike the original game, this screen doesn't show how much cheese (rings) has been collected, how much time was left, or how many mice (Marios) were rescued.

Checkpoints are quite common in the game and placed in a variety of odd locations, with a possible reason being that the original game emphasizes rescuing trapped mice more than actually getting to the end of the screen, acting more as a "collect-a-thon" than a standard left-to-right platformer. However, the first level of the hack is the "Surely Woods" level, picked presumably because it is a linear, fast-paced level with more clever checkpoint placements, and better resembles the gameplay of the original Sonic games.


The songs can be found in Options as a Music Test. Some tracks found in the original game were removed and/or swapped for different songs.

Name / Originally No.
El Gato Battle #2 00, 02, 04, 05, 07, 08, 11, 13
Sleepy Rock (00)
Snowy Cabin (02)
Surely Wood (05)
Fiesta City (07)
Ye Olde Bountry (08)
Level Complete (11)
Game Over (13)
Ancient Keep 01
Galactical Galaxies 03, 12
Title Screen (12)
El Gato Battle #1 06
Continue? 09, 16, 17
Battle with Pirate Gato (09)
Map (16)
Introduction 10
Staff Roll 14
The Mice Have Been Rescued 15


  • Coding: Alex
  • Animations: Mr.Byte/TEG
  • "Sonic!" voice: Mongrut(?)



Main article: Sonic the Hedgehog (SNES)/gallery


  • Some levels that were present in the original game, but removed in the hack, are accessible through save state hacking.
  • This hack is similar to Sonic 6 for the Game Boy; both are Speedy Gonzales games on Nintendo platforms hacked to include Sonic in them, and their first levels are in a forest setting.
    • Twin Eagles Group also made Sonic the Hedgehog 2 for the SNES, which while similar in concept, is actually a hack of Sparkster and is unrelated to Looney Tunes in any capacity.
  • The ending screen features the line "Sonic loves Nintendo, Mario loves Sega". There is an irony to this line as Sega eventually stopped making consoles and started releasing previously exclusive games for other platforms, including later Nintendo ones.
    • In addition to this, a version of Columns was released for the Super Famicom by Marigul Management and Media Factory, which was licensed by Sega and is unique for being the only game to bear their official licensing on any version of the SNES.