Hi, I just came up with a new egg idea! every Friday the 13th there should be an egg that has special Pokemon. This egg should contain the following: Gengar, Dusclops, Banette, Sableye, Aron, Sharpedo, and Nosepass.
It seems nice but in my opinion that would ruin the uniqueness of holiday pokemon and the economy since "Limited Time" eggs have 80% IVs.