In "The Answer Smurf," Gargamel used his newest invention on a blueberry bush as a demonstration in catching the Smurfs. However, blueberries were unknown in Europe until the 17th century when they were imported from North America (where they are native of). The background of the Smurf cartoon series is the late Middle Ages (circa 14th-15th century), early for the knowledge of blueberries in Europe.