FernGully: The Last Rainforest

In the peaceful forest of FernGully, fairies live under the protection of Magi Lune, a wise and powerful fairy. Her granddaughter Crysta is fascinated by the outside world and doesn't believe humans exist, until a bat named Batty Koda tells her stories of human experiments. Crysta finds a human named Zak, shrinks him to fairy-size, and takes him to Magi Lune to un-shrink him.