As I understand, you want to transfer a Pokemon from a Gen 3 game to Pokemon Y, correct? Hoo boy, that's a lot of trading to do. Thankfully, Trade Corner has a guide on the very thing.
Click this link and read under "How to Migrate" and you should be good to go, I hope. If you have any further questions, feel free to ask them in Trade Corner's quick questions thread found
here. As for battling tips, I recommend reading through the resources found in
this link. Cheers!
Sadly I'd have to close this thread because it doesn't belong here :(
Locked.