| 2 | Golurk | 19351 | 14.399% | 16735 | 15.154%
| 4 | Gardevoir | 16242 | 12.086% | 12885 | 11.668% |
| 28 | Zangoose | 8129 | 6.049% | 6321 | 5.724% |
No Pokémon in NU, has more than 15% usage. That being said, even Golurk is in only one out of seven teams. Zangoose is in one out of eighteen teams. That difference isn't that big, and shows that the NU metagame has a lot of possible options since Zangoose is at #28 in December usage statistics.
I didn't mention the most-used Pokémon, Cinccino, since it got kicked to RU, but even then, it had barely more than 15% usage as well.
Also, if your Gardevoir does not pack a punch, you are doing something wrong. It actually makes me think that you clicked Kirlia by accident.
Gardevoir is the most fearsome special attacker in NU at this moment, bar Charizard in the sun, and it has so many moves in its gown, both to support the team and to set up and attack, that you will never know for sure what it is going to do.