Large Ham: At one points she is even eating a very large ham, which would count as a Lampshade Hanging had this film been made later. Cloris Leachman's voice acting in the Disney dub takes it Up to Eleven.
Five-Token Band: There are more than five, but they fit the trope. Some of them are black-skinned, others have distinctly Asian features. Most of the other characters look Caucasian (which figures since the movie is set in a fantasy version of Wales).
The dark skinned ones and a few others are implied to not be one of Dola's sons, but instead other crewmembers.
That, or adopted, since they all still call her Mom.
It is quote possible, that the dark-skinned crew members are her biological sons, but don't have the same father as the others.