They also appear at the Ravello character breakfast (which occurs twice a week). However, I found it to be one of the more expensive character breakfasts, most of the food just OK and only the French toast was great. If I had it to do over, I'd skip it.
They also appear at Mickey's Backyard Barbecue, which might be worth it if you have pre-schoolers, but not one of the best character meals for adults/teens/older kids, IMHO.