Download the release file from here. It contains all the Powersaves. The file name of the release archive wouldn’t make you think it does. “oot3dhax_rawsaveimages_haxpayloads_03-01-16.zip” doesn’t say Powersaves too. But there’s a powersaves directory in it. It’ll be fun trying to figure out which file to use.
If you have the latest firmware on an Old 3DS, use the POST5_U_25600_usa_9221 file. You can find out which file to use here. Just click Download otherapp.
Only two files you have to try, unless you know the card ID.
You can download the raw save images, and Powersave images here. I could of made a new archive with only the Powersaves. I’ll probably get a take down notice. You can download it from github.com too.