Hacking Request: Super Mario Galaxy 1&2 savegame conversor

[ronin47]

Hi.
Is there any project to convert the savegame of Super Mario Galaxy 1 & 2 from Wii to Switch? Some time ago a user here created a converter/save editor for Super Mario 3D World from WiiU to Switch and it works perfectly.

 

[Rulesless]

+1

 

[Lostbhoy]

What's wrong with just playing the game?

 

[Rulesless]

In my case, unlike most people, it's not my favorite Mario chapter and I would finally like to complete it from MY Wii save (then moved to WiiU... without completing it there either!): I certainly don't want to start from scratch!

The size and name of the save are the same, I tried changing the header in hex (inserting first 16 bytes from the new save), but even so the game crash.

 

[ronin47]

A converter is needed. There are several reasons to want transfering our saves from Wii as above user say: lack of time to start the game from the beginning, don’t like the game, having played part of the game not many time ago, etc.

 

[Rulesless]

So, excluding header and footer (and the 02 06 00 00 before the PLAY-YALP occurrences), the data are ByteSwapped (in some places in Little Endian, in others, it seems, CDAB) and shifted (separated by some 00).
The CRC at the end of the file is not present
All modification attempts failed

 

[ronin47]

So, excluding header and footer (and the 02 06 00 00 before the PLAY-YALP occurrences), the data are ByteSwapped (in some places in Little Endian, in others, it seems, CDAB) and shifted (separated by some 00).
The CRC at the end of the file is not present
All modification attempts failed

Are you trying by modifying the original Wii save file?

 

[Rulesless]

Are you trying by modifying the original Wii save file?

Yes, but nothing at the moment

 

[ronin47]

Can I help anyway?
The user that made the converter for the Super Mario 3D World some time ago was @DNA-Trainer. I have tried to contact with him but it seems to be offline…

 

[Rulesless]

‍

 

[S0lin0]

following

 

[ronin47]

Any new about this?

 

[timschneeb]

I created a save converter for Super Mario Galaxy 2 since I wanted to carry over my incomplete Wii save to my Switch. I haven't tested it extensively, only on my own saves, but it works great so far.

There are a lot of changes between the Wii & Switch save data formats, so I had to re-implement an entire parser/writer for the custom save format, which was way more work than I thought. Because of that, it only supports Galaxy 2. I don't know if/when I'll implement Galaxy 1 support because that's still a lot of work, and I personally don't need a converter for that game. But maybe I'll look into it over the next few weeks.
It's open-sourced here if someone wants to help out with that: https://github.com/timschneeb/galaxy-save-converter (btw, the save format of Galaxy 1 was already documented here by someone else, only the Wii version though).

The save converter is available as a web app here: https://galaxy.0001002.xyz/

It can also convert from Switch back to Wii format; as well as from/to a JSON text file, which might be useful for editing save files manually.

 

[Rulesless]

Thanks for sharing, it seems to work perfectly.

 

[ronin47]

Thank you so so much!!! I wish you can make a Galaxy 1 converter please

 

[ronin47]

Incredible!! I'm continuing my gameplay from where I stopped it almost fourteen years ago! Scene is pure magic!!

 

[salope]

I created a save converter for Super Mario Galaxy 2 since I wanted to carry over my incomplete Wii save to my Switch. I haven't tested it extensively, only on my own saves, but it works great so far.

There are a lot of changes between the Wii & Switch save data formats, so I had to re-implement an entire parser/writer for the custom save format, which was way more work than I thought. Because of that, it only supports Galaxy 2. I don't know if/when I'll implement Galaxy 1 support because that's still a lot of work, and I personally don't need a converter for that game. But maybe I'll look into it over the next few weeks.
It's open-sourced here if someone wants to help out with that: https://github.com/timschneeb/galaxy-save-converter (btw, the save format of Galaxy 1 was already documented here by someone else, only the Wii version though).

The save converter is available as a web app here: https://galaxy.0001002.xyz/

It can also convert from Switch back to Wii format; as well as from/to a JSON text file, which might be useful for editing save files manually.

So I transfered my gamedata.bin from my wii but how do I overwrite it on my switch?