how does this work? and where did you find this?

ahh nvm found it, i'd do it if i didn't have to mess with the bootfirm file and pretendo wasn't working on it, strange foreign file

its a 3gx plugin

kinda like vapecord

How can I use this? And is there a way to use it without having my computer that I lost?

you can use your phone

use ftpd to transfer the files to your 3ds

Honestly it's harder to find people to play with...