Thread:BunsenH/@comment-37867815-20190927163220/@comment-31797469-20190930153309

You cannot really do the overlaying with GIFs since the effect is partially transparent, and GIFs do not support partial transparancy (as PNG's do).

I experimented with this a few months ago and found a way to do it if you provide a background (Note: old version, where Rare Egg used the old Mammott egg, but with rare shimmer):