King's Quest: See No Weevil

Rosella feigns an illness to avoid going to a wedding in a neighboring kingdom. With her parents safely out of the way who left Oswald in charge, she begins meddling in kingdom affairs. She "pulls rank" whenever she can, spends money without heed, and scorns and belittles anyone she feels is "less" than she is.

This causing a plauge of weevils and then lizard-like sloks across the land.