I've tried. Can't do it. It's complicated, hard, and a bit annoying to try as it wastes a lot of time each attempt.
Pro-tip for non-RNGers: Flash cart, box every egg, after 30 or so (a full box), use PPSE (a homebrew thing for Flash Cart users) to check what's in each egg. Anything good? Yes? Keep it. No? Get rid of it.