Cars (Disney, Pixar) on xbox 360 was already confirmed region free few years ago.
There is NOT even a region locked of this game exists.
Also, this game was only released in US and UK, no more. How could a " East Asia region " you found ?
probably you don't know,
Disney Interactive, the publsiher, did not even release any " Asian version " on xbox 360 at all.
Asian console gamers play the US version disc because its region free.
You looks like one of those ignorance putting complaints without getting more knowledge first, and never reply back ( running away after post ).