The Duel Against Good and Bad

 is the seventh episode of the second season of Star Teens Unite!.

Summary
Veronica gets accidentally sent to Arco Iris and met up with Evadora. Meanwhile, the Star Teens in Arco Iris meet a beautiful good witch in the world, Gwendolynda. As Gwen and Eva meet, a duel between Ella and Veronica awaits!

Debuts

 * Gwendolynda

Characters

 * Ella
 * Inidra
 * Sandra
 * Felicia
 * Lisa
 * Tanya
 * Sheila
 * Trixie (Ella's mother)
 * Julie (Ella's younger sister)
 * Veronica
 * Evadora
 * Gwendolynda

Voice Cast

 * Aimee Carrero - Tanya
 * Ariel Winter - Julie
 * Candi Milo - Evadora
 * Colleen O'Shaughnessey - Trixie
 * Grey Griffin - Sandra
 * Hynden Walch - Gwendolynda
 * Jennifer Hale - Veronica
 * Kari Wahlgren - Ella
 * Kate Micucci - Inidra
 * Kimberly Brooks - Sheila
 * Tara Strong - Felicia
 * Vyvan Pham - Lisa

Trivia

 * Gwendolynda makes her debut here. She's known as the Good Witch of Arco Iris. In fact, her name refers to Wizard of Oz character Glinda the Good Witch. Evadora appears for the second time this series. Her name refers to as the novel's antagonist Elphaba the Wicked Witch of the West.
 * Gwen and Eva change Ella and Veronica into different animals who attempt to destroy one another. This serves an inspiration to Disney's 1963 movie, "The Sword in The Stone".
 * The animals Eva changes Veronica into include a saltwater crocodile, red fox (black phase), cassowary, African elephant, Bengal tiger, Eastern diamondback rattlesnake, black rhinoceros, and even a mythical Hydra. The animals Gwen changes Ella into include a gopher tortoise, cottontail rabbit, giant centipede, walrus, house mouse, coconut crab, and water buffalo.