I can in fact confirm that I was the one who bred that Froakie. I wanted to breed something that I knew anyone would want to train, and Protean Greninja popularity is why. Plus I thought breeding something in a rare ball would be cool.
Noticed you have been participating in the egg swap, but I haven't seem to have gotten you online. My FC is 4786-0190-7051 if you haven't added me yet.