I heard if you play Sonic Adventure 2 on December 25 Sonic will be in a Santa suit and Tails will be in an Chirstmas Torado 2, is this true? Thanx!!
No, not true, however, you can download the theme. There's also a Halloween theme. Both can be found here in the downloads. You need to be on your Dreamcast online however in order to save it onto your VMU.

- Lighthead