Disney’s Adventures of the Gummi Bears Season 4 Episode 9 Top Gum Episode Title: Top Gum Episode Description: Cubbi finds himself eager to meet dwarfish beings called Aerials who live amongst the clouds, but struggles to learn how to fly with Arty's assistance. After several failed attempts, he constructs a flight pack powered by Gummiberry juice, which allows him to reach the floating island of the Aerials. However, Cubbi and Arty soon learn the Aerials are not as friendly as they seem to be, and find themselves forced to stop them from conquering the world below.