Need a sixth pokemon for my team - easy ten points!?

I have just begun playing pokemon x. I have just beaten pokemon y with Goodra, Gardevoir, Greninja, Blaziken, Hawlucha, and Aurorus, so basically I am limited to making a team out of pokemon found in kalos that isn't one of those six.

Right now my new team that I bred from pokemon y is Pawniard, Litwick, Trapinch, Gourgeist, Mawile, and Inkay. Pawniard wasn't part of my plan but I accidentally bred one with perfect nature and amazing ability, but now I'm stuck with two ghosts, two dark, and two steel pokemon type-wise and no one to learn surf.

Originally, the team was supposed to be Blastoise, Flygon, Gourgeist, Mawile, Malamar, and either Glaceon or Slyveon.

So, now that I have given you this information, which pokemon should I replace Inkay with, basically, or: should I replace a different pokemon or should I keep my team the same and change it later possibly?

I don't have a surf pokemon if I keep it the same. I am keeping Mawile on the team for sure. It's ok with me to have a little bit of a type weakness because these pokemon have decent movesets and I do not battle competitively.