I've actually used Thunder Punch Typhlosion (physical, not mixed) with Passho Berry to try and surprise water types, but it doesn't really have the Atk to pull it off. Probably my least successful gimmick, and that's a list that includes Choice Band Dedenne.
Speaking of bad gimmicks:
http://replay.pokemonshowdown.com/gen7balancedhackmons-485921601
Stockpile Klefki vs the World
http://replay.pokemonshowdown.com/gen7balancedhackmons-485924682
How to make Pheromosa even more broken than it already is - coverage. Also, FakeSpeed Megagross
http://replay.pokemonshowdown.com/gen7balancedhackmons-485933774
I will never understand Balanced Hackmons.
http://replay.pokemonshowdown.com/gen7balancedhackmons-485939083
M-Sceptile vs the World. M-Sceptile loses, calls the World a noob.
http://replay.pokemonshowdown.com/gen7balancedhackmons-485941296
What is this, I don't even? Someone help me out.
Speaking of bad gimmicks:
http://replay.pokemonshowdown.com/gen7balancedhackmons-485921601
Stockpile Klefki vs the World
http://replay.pokemonshowdown.com/gen7balancedhackmons-485924682
How to make Pheromosa even more broken than it already is - coverage. Also, FakeSpeed Megagross
http://replay.pokemonshowdown.com/gen7balancedhackmons-485933774
I will never understand Balanced Hackmons.
http://replay.pokemonshowdown.com/gen7balancedhackmons-485939083
M-Sceptile vs the World. M-Sceptile loses, calls the World a noob.
http://replay.pokemonshowdown.com/gen7balancedhackmons-485941296
What is this, I don't even? Someone help me out.