ROM Hack Question How to "Decrypt" save game values?

[Sacer]

Hi!

Since no save-editor for "Rayman Legends" exists I tried to modify the savegame on my own. I already played the game to 100% except for 1.000.000 Lums.

What I did:

- started rayman and wrote down the exact amount of Lums I got
- made a backup with checkpoint
- started rayman, collected some lums and wrote down the exact amount of Lums I got now
- made a backup with checkpoint
- put both files in a file differ

So I got:
Lums // Hex value within the savegame
479468 // A6 80 B9 33 84 1D 63 89
479630 // AF 2B 2F 1C 98 AA 6C A0

But now I don't know what to do with this information since it seems to be somehow encrypted...

maybe someone could give me a hint how to proceed now?

 

[DesuIsSparta]

If it was encrypted, all of the contents of the file would be completely different from the last (that's the point of encryption, hiding the contents in a way that isn't obvious).

I haven't played Rayman so I don't know what 'lums' are but if they are inventory item, it is possible that the inventory is structured based on the items in it (rather than a standard inventory container with various objects within it).

What I would try to do now is to substitute some of those bytes with a random byte such as FF or 00 and see what happens.

 

[PatrickD85]

I think you should give NSwitchDebugger a chance.
Do what you did from there, and you should be able to get the exact hit and change the values.

Im not on location so I can not to a detailed how to but;

Play game
Press Homebutton open NSwitchDebugger
Search Memory, enter your value, Save
Exit and play game change amount
Press Homebutton open NSwitchDebugger
Search Memory again and choose to use previous search as a base
Enter new value
If 1 hit
Edit memory.

That should help you crack this IF the data is not saved in a different fashion.