I am the person in question, whose PC the Feebas is locked in. Ign Kitarial. And yes, as Faasnu says, we were trying to trade evolve my Onix and their Feebas. I’m a long way off from Hoenn, and feel bad, so if it’s possible to get their Feebas back to them, please help. We’re in the Silver server.
Edit: I just now realize I posted from the wrong account, but I can provide further screenshots as needed.
Edit: Here's the feebas locked in my pc.