You mean Powersaves, the hacking dongle for 3DS?
If so, the answer is NO.
Powersaves don't even let you inject edited 3DS saves.
So even if it could be used with NDS saves, you won't be able to inject it back to your cart.
Install CFW to your 3DS. Any 3DS can be hacked: https://3ds.hacks.guide/
Once your 3DS is hacked, you can extract your NDS save using homebrew (point 2 or 3),
Any other questions, start your own thread and ask there. However note we ain't a 3DS hacking forum, so quality of answers may vary.