Now that I've got my Milotic, I can retire in peace. Just kidding, no retiring for me.

Anyways, I want a team that is a bit more balanced. I don't wanna change the ones I have but I do want another pokemon on this team.

I have a Salamence, Flygon, Milotic, Blaziken, and Aggron (or whatever it is that lairon evolves into). Anyways, I was thinking that my team hasn't got much that's very solid against water types or psychics. I would like something that is new not in any of the games from before Ruby. I like Metagross but with Aggron I don't need another tough guy. I'm not all that familiar with pokemon in this generation. Some that I do like are:

Relicanth, Metagross, Sharpedo, shiftry and cacturn. I think shiftry and cacturn have potential to be awesome I just don't know what moves they get. Any help?