3DS:Sonic Decompilations

This tutorial will take you through setting up the Sonic Decompilation 3DS ports.

Technical Details (optional)
These ports are based on the decompilations by for the mobile versions of Sonic 1, CD, 2, and Sonic Mania.

They require a  file from a legal copy of the game(s) to be able to run.


 * -|Sonic 1 (2013)=

What you need

 * A  file from  the Mobile port
 * Tutorial can be found here.
 * The latest release of Sonic 1 (3DS)
 * If you have issues, try to use the  version instead.

Section I - Prep Work

 * 1) Power off your console
 * 2) Insert your SD card into your computer
 * 3) Create a folder named  on the root of your SD card if it does not already exist
 * 4) Copy  to the   folder on your SD card
 * 5) Create a folder named  on the root of your SD card if it does not already exist
 * 6) Create a folder named  in the 3ds folder on your SD card if it does not already exist
 * 7) Copy  to the   folder on your SD card
 * 8) Reinsert your SD card into your console
 * 9) Power on your console

Section II - Installation
You're done! You've successfully installed Sonic 1 on your console.
 * 1) Launch FBI from the HOME Menu
 * 2) Navigate to  ->
 * 3) Press on Sonic 1, and select "Install and delete CIA"
 * 4) Once installed, press, then to close FBI

What you need

 * Sonic 1 Forever (the 1.4.2 mod only release)

Section I - Prep Work

 * 1) Power off your console
 * 2) Insert your SD card into your computer
 * 3) Navigate to, then create a folder named
 * 4) Extract  from the Sonic 1 Forever   and copy it to
 * 5) Reinsert your SD card into your console
 * 6) Power on your console

Section II - Loading the mod
You're done! You've successfully installed Sonic 1 Forever (1.4.2) on your console.
 * 1) Launch Sonic 1 from the HOME Menu
 * 2) Press on
 * 3) Press on   to activate it
 * 4) Press to exit the mods list
 * 5) Once the game has reloaded, press, then to close Sonic 1
 * 6) Relaunch Sonic 1 from the HOME Menu


 * -|Sonic CD (2011)=

What you need

 * A  file from either the Mobile port or the delisted Steam release
 * Mobile: Follow this tutorial.
 * PC: Browse the games local files via Steam (Right click the game on the sidebar -> Browse Local Files) and keep the directory open.
 * The latest release of Sonic CD (3DS) (the  file)
 * For old 3DS users, download the  version
 * For new 3DS users, download the  version

Section I - Prep Work

 * 1) Power off your console
 * 2) Insert your SD card into your computer
 * 3) Create a folder named  on the root of your SD card if it does not already exist
 * 4) Copy SonicCD to the   folder on your SD card
 * 5) Create a folder named  on the root of your SD card if it does not already exist
 * 6) Create a folder named  in the 3ds folder on your SD card if it does not already exist
 * 7) Copy  to the   folder on your SD card
 * 8) Reinsert your SD card into your console
 * 9) Power on your console

Section II - Installation
You're done! You've successfully installed Sonic CD on your console.
 * 1) Launch FBI from the HOME Menu
 * 2) Navigate to  ->
 * 3) Press on Sonic CD, and select "Install and delete CIA"
 * 4) Once installed, press, then to close FBI


 * -|Sonic 2 (2013)=

What you need

 * A  file from  the Mobile port
 * Tutorial can be found here.
 * The latest release of Sonic 2 (3DS)
 * If you have issues, try to use the  version instead.

Section I - Prep Work

 * 1) Power off your console
 * 2) Insert your SD card into your computer
 * 3) Create a folder named  on the root of your SD card if it does not already exist
 * 4) Copy  to the   folder on your SD card
 * 5) Create a folder named  on the root of your SD card if it does not already exist
 * 6) Create a folder named  in the 3ds folder on your SD card if it does not already exist
 * 7) Copy  to the   folder on your SD card
 * 8) Reinsert your SD card into your console
 * 9) Power on your console

Section II - Installation
You're done! You've successfully installed Sonic 2 on your console.
 * 1) Launch FBI from the HOME Menu
 * 2) Navigate to  ->
 * 3) Press on Sonic 2, and select "Install and delete CIA"
 * 4) Once installed, press, then to close FBI

What you need

 * Sonic 2 Absolute (the 1.1.1 mod only release)

Section I - Prep Work

 * 1) Power off your console
 * 2) Insert your SD card into your computer
 * 3) Navigate to, then create a folder named
 * 4) Extract  from the Sonic 2 Absolute   and copy it to
 * 5) Reinsert your SD card into your console
 * 6) Power on your console

Section II - Loading the mod
You're done! You've successfully installed Sonic 2 Absolute (1.1.1) on your console.
 * 1) Launch Sonic 2 from the HOME Menu
 * 2) Press on
 * 3) Press on   to activate it
 * 4) Press to exit the mods list
 * 5) Once the game has reloaded, press, then to close Sonic 2
 * 6) Relaunch Sonic 2 from the HOME Menu
 * -|Sonic Mania=

What you need

 * A  file from any version of Sonic Mania you can obtain it from (i.e. PC, Nintendo Switch)
 * Switch: Dump the  with, and copy the   to your PC.
 * PC (Steam): Browse the games local files via Steam (Right click the game on the sidebar -> Browse Local Files) and keep the directory open.
 * PC (Epic Games): Press the  in your Library -> "Manage" -> press the folder icon, then keep the directory open.
 * The latest release of Sonic Mania (3DS) (the  file)
 * If you compiled the port, you can find the  you built  in the cloned repository directory, then

Section I - Prep Work

 * 1) Power off your console
 * 2) Insert your SD card into your computer
 * 3) Create a folder named  on the root of your SD card if it does not already exist
 * 4) Copy  to the   folder on your SD card
 * 5) Create a folder named  on the root of your SD card if it does not already exist
 * 6) Create a folder named  in the 3ds folder on your SD card if it does not already exist
 * 7) Copy  to the   folder on your SD card
 * 8) Reinsert your SD card into your console
 * 9) Power on your console

Section II - Installation
You're done! You've successfully installed Sonic Mania on your console.
 * 1) Launch FBI from the HOME Menu
 * 2) Navigate to  ->
 * 3) Press on Sonic Mania, and select "Install and delete CIA"
 * 4) Once installed, press, then to close FBI