My understanding is he's generally been at dinner, but he is now usually at breakfast also. From 2006 to 2007, the changes we noticed were the chipmunks were removed from breakfast and replaced with Donald. This was accurate as of mid-March when I was last there. Always a good idea to ask though when making your reservations, although they can't guarantee anything. Hope this helps!
We were at CM for breakfast a few weeks ago and Donald was there. We celebrated DS birthday and Donald helped blow out the birthday candle. This made a wonderful picture. Hey it's great to see another Wildcat fan. My family bleeds blue too!!
DHDSME