I guess the mythical handshake never really caught on, at least between Rhett & Link. You occasionally see some people here on the Kommunity talking about using it when encountering a Mythical beast in the wild, though!

I managed to find the episode where they announced it for you: https://www.youtube.com/watch?v=3Nxk0Zzyl2I

Thank you! I put a lot of work into making it. 

Hopefully it does well in the voting for the new banner even though they aren't using my final design.

I see! Thanks for asking.