Cubbi Gummi is the youngest of the Gummi Glen Gummis. He was voiced by Noelle North.
He dreams of becoming a great Gummi knight. He is incredibly impetuous and has a tendency to get anything mysterious and exciting. He dons a mask and becomes a vigilante known as the Crimson Avenger. He is best friends with the human Cavin, and coincidentally, he was the first Gummi that Cavin encountered.