Marenthyu's Guide to Custom Firmware using SeedMiner
Welcome! You have come here, i guess, on the prospect of installing custom Firmware on your new/old Nintendo 2DS/3DS using the single-System Nintendo DSiWare Injection. This means you do not have one of the following things:
- a hacked 3DS system which can be transfered to the unhacked one
- a compatible flashcart (see this chart)
You may have come here not fully knowing what SeedMiner is and how it works. Click the following button if you want to see
What is SeedMiner?
SeedMiner is a tool that allows you to brute-force a console-unique Key. It utilises your Graphics
amazing processing power to try out all possible combinations, with one of them being guaranteed to
Using this key (or "seed"), it is possible to then sign a DSiWare Game which has been modified to run an exploit on your Device when launching it.
This all is only possible thanks to a flaw in the key calculation, which makes it (almost) predictable -
information on the nitty-gritty details can be found on
zoogie's explanation slide here, but long
using your LCFS (Local Friend-Code Seed),
it is possible to predict your
movable.sed key with an accuracy of about +-4000, which we
then can "easily" brute-force.
In addition to getting everything you will need to get your
movable.sed, this guide will
recommend you a few tools which you can then use to actually inject your modified Game/Save onto your
In most cases, you will be able to use an automated service, but if that fails you, you may need to try one of the other tools available to you.
This guide will, at all times, attempt to be as thorough as possible, but i can not guarantee it to be
understandable 100% of the time. If you have a question and/or don't understand something, don't hesitate to
In General, you have the following help sources:
- The seedminer GBATemp Thread
- The Seedminer FC and mining help GBATemp Thread
- Me, Marenthyu, on Discord.
If you ask for help there, please make sure to tell the persons there that you are coming from this guide, giving them this link.