I'd definitely give them a call and see what's available, you might be surprised!
O'hana at the Polynesian resort has a character breakfast, a co-worker of mine has eaten there before and said it was really good, also I've heard that the Cape May character breakfast at the Beach Club resort doesn't fill up as much either, and it gets good reviews. The Crystal Palace in MK serves all 3 meals as character meals also, maybe there would be openings left. Can't hurt to call and ask!
Let us know what you find!