Went after Terrakion today, after beating Marlon. Didn't take me long (Maybe my 5th or 6th capture) to find a Jolly one. I was very pleased, and went to EV train him. I'm about halfway through EV training (I hate doing it) but I need to do it now. I want to use him to finish the game (Team Plasma story and Elite 4) so I need to EV train him so I don't mess him up. I think I might use him in my competitive team as well. With the announcement of X and Y, I'm planning to spend 2013 collecting a variety of Pokemon and EV training them. I've played every version (I remember when Pokemon was yet to be released... how excited I was for such a neat sounding game) but never did much after the story. I've never completed a Dex. I've never had an EV trained team. I've never had level 100 Pokemon. I want Gen VI to be the first gen I fully experience, and so I'm preparing now, starting with a properly EV trained Jolly Terrakion.
I don't know which member of my team (in signature) I should replace with Terrakion though. Happily accepting thoughts. I'm thinking Magnezone.