Shikishunga

Does anyone remeber that GTS pokesav exploit where you could send the pkm file to the gts and then recieve it? does that still work? i tried it recently and got error code 21500.

it just launches it if i do that, doesnt actually do anything with the pkm file

So i downloaded the legit checker, i open the exe, and i then drag the pkm file into the black box. now what? i see the file location script but what do i do to get it to actually give me info on whether its legit?