ROM Hack Question Convert Wii U save to Switch save for Captain Toad: Treasure Tracker

[JeepX87]

I tried to convert Wii U save to Switch save, so it didn't work and tried to change the value via hex editing, but not successful.

Please anyone could help with conversion? The file size for all systems are 33 KB.

Remove "Switch" and "WiiU" before you put save in your Switch for testing.

 

[SleepyPrince]

I don't have the game, but from what I can tell from looking at the 2 files, WiiU is in big-endian and Switch is in little-endian.
And seems to have a 18 bytes shift between the 2, also not sure what the header stands for or if there is any checksum

 

[BtEtta]

Given there are a few extra levels in the Switch/3DS version I'd assume the extra bytes are to keep track of the progress on those levels?

 

[SleepyPrince]

Given there are a few extra levels in the Switch/3DS version I'd assume the extra bytes are to keep track of the progress on those levels?

Those extra bytes isn't enough for more levels, but there are a lot of unused space in the save file already that can accommodate extra levels

 

[JeepX87]

I don't have the game, but from what I can tell from looking at the 2 files, WiiU is in big-endian and Switch is in little-endian.
And seems to have a 18 bytes shift between the 2, also not sure what the header stands for or if there is any checksum

I'm wonder about convert the save from 3DS to Switch? They supposed to be exact same game version. I attached the save for 3DS version.

Given there are a few extra levels in the Switch/3DS version I'd assume the extra bytes are to keep track of the progress on those levels?

4 exclusives in Wii U version were removed in 3DS and Switch version, but they added 4 new exclusive levels from Super Mario Odyssey.

Deleted (3DS and Switch version)
Super Bell Hill
Conkdor Canyon
Shadow-Play Alley
Clear Pipe Cruise

Added (3DS and Switch version)
Secret of the Inverted Pyramid
Mine Cart Cascade Crusade
Uptown, Downtown
Cookatiel's Sizzling Sprint

Special thanks to @dsrules for cheat that I used in 3DS version of save.

 

[SleepyPrince]

3DS save look similar to the switch one, can you try to make another save with slight changes on the 3DS/Switch so I can compare the header?

 

[JeepX87]

3DS save look similar to the switch one, can you try to make another save with slight changes on the 3DS/Switch so I can compare the header?

Sure, I made slight change after clear the course on both platforms.

 

[SleepyPrince]

Some values changes in the header between saves, can't tell what they are.
What kind of hex editing have you tried? and how did it not work? crash?

 

[JeepX87]

Some values changes in the header between saves, can't tell what they are.
What kind of hex editing have you tried? and how did it not work? crash?

I used HxD and I tried to change the value but save got wiped out.