I used to clone with the GTS glitch, but it depends on your modem brand of all things. Can't do it with my new one.
I've discovered my boss has a huge collection of EV'd Pokemon (!) and it looks like I might be able to borrow some for the tourney. Awesome.
Do you know about shoddy battle? It's an online emulator thing where you can just set your EV's and movesets and get straight to battling. Great if you enjoy making up kick ass teams but don't enjoy spending hours making them.