Also I had an idea years ago for a Jynx and a Gardevoir that were sisters. And then I got really SAD when I found out that Jynx and Gardevoir are not in the same egg group so they cannot, in fact, be sisters. That was until Gen 8, baby!!!
Years ago I made some Sonic stage Ginjinkas. Green Hill Zone, Emerald Hill zone, Sandopolis Planet Wisp and Stardust speedway (which I never got to finishing)