[quote name='lolwut?']So I figured I'd ask here, since Google is turning up nothing; I picked up Tekken 6 today, and I've been trying to run through Arcade mode, but I keep getting paired up with people online, despite it being an "offline mode." I searched all the options in the game and found nothing that would seem like I could turn off this fight request feature, and the manual doesn't say anything helpful about this.
Please, please tell me Namco wasn't stupid enough to not include an option to turn this off, besides disconnecting from XBL.[/QUOTE]
You aren't actually playing against people online... you are playing against "Ghost" characters that are programmed into the game. These characters have custom items and slightly different artificial intelligence, but they are basically the same as any other computer character.
Unplug your ethernet or DC from your wireless and you'll notice that you are still fighting them.
There is a whole mode dedicated to fighting these characters called Ghost Battle. It is slightly more entertaining than running through Arcade Mode over and over again because like I said, they do have modified AI which makes the fights a bit more interesting.
There is an achievement for beating 30 of them.