Jolteon* is an idea that came from none other than Chris Fulop. (Most weird tech ideas stem from him.) I had been playing Jolteon for months. I also ran it all last year in the last format with Banette ex.
It's not that important but just in reply to what someone else said earlier about elite players/techs, in GG Jolteon * is just a searchable pluspower (which doesn't work when you were locked the previous turn). The self 10 dmg is a disadvantage. Whereas in Banette ex, and Gyarados variants the self dmg is usually benefitial. By no means is this post saying the Jolteon was a bad GG tech