Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
So as you can see by the title of the thread, this team will feature mega gardevoir. Which for the most part is an interesting mega pokemon in the current DOU Meta since it has some good matchups and some really bad matchups. But covering these holes is what the rest of the team is for. So...