How to downgrade SDK version of an update?

HasRock17 · Friday at 2:48 PM

I tried using SKA but still DBI tells me this:

WhatsApp Image 2026-07-03 at 08.25.09.jpeg

WhatsApp Image 2026-07-03 at 08.33.23.jpeg

emcintosh · 2026-07-04T14:20:29+0100

Hmm… I had no problem running FB3 on HOS 18? 19? Is this a recent update?

You could try using a different installer.

HasRock17 · 2026-07-05T11:11:59+0100

emcintosh said:
Hmm… I had no problem running FB3 on HOS 18? 19? Is this a recent update?

You could try using a different installer.

Yes, it's latest 2.0.0 update that fixes stuff and add new exercises bug-fixes.
1.3.0 it's the best one since that works on 20.5 and below

lightwo · 2026-07-05T16:09:57+0100

Since you're using DBI, I believe the process goes like:

Export SDK from an older game/update
Import SDK to this game update

I recall that some versions of DBI either have import/export SDK disabled or broken, so be aware of that.

For reference, here's what that process looks like if done manually:

Post in thread '"Import/Export SDK" without DBI?'

Jun 22, 2026

By poking things around, it looks like all that's required is to:

Extract NSP of older game (e.g. Pokemon Legends Z/A can be used to make Tomodachi Life: LTD work on FW 19)
Extract exefs/sdk and exefs/subsdk*(thanks duckbill007)
- The subsdk binaries may be indexed differently by different games (e.g. subsdk0 in game A = subsdk2 in game B) (thanks duckbill007)
Copy them to LayeredFS dir for an older game (e.g. /atmosphere/contents/<TID>/exefs/)

Separately from that, it's also required to patch NSP or use a compatible...

How to downgrade SDK version of an update?

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