Can you download sonic adventure 2 battle

I think you can download it only on those sites where they have downloadable movies,PC games,music etc.But I'm totaly sure you can download it on www.sonicroms.net but for that you need to be a number there.Thrust me i tried to download a game on that site but i had to be a number.And the site where you can't miss it is mininova(just enter mininova on www.Google.com and click the first option).Thank you for your time and i hope you download that game.