Atlantic: The Curse of Nerissa

Atlantic: The Curse of Nerissa is the one-hour special and the 17th episode of Season 26.

Summary
When Catboy tries to summon a previous hero that wore the ocean pearl bracelet before Kwazii, he accidentally summons the leader of C.H.Y.K.N. and the enemy of W.I.T.C.H., Nerissa, who plans to take back her power to take over Earth and other worlds. So in order to stop her, Catboy gets help from a guest appearance of Will Vandom (the first non-Disney hero to wear the ocean pearl bracelet and be summoned by it), who teaches him to learn from his mistakes to save the day.

Plot
The episode begins at night after night of another ocean pearl bracelet lesson, Kwazii and Catvoy were stargazing at Starlight Beach and enjoying the moonlight. It has been a very peaceful and awesome night, and Catboy was glad that he is Kwazii's apprentice, just to help him learn how to use it properly and hopes that he'll be as good at using it as much as Kwazii, just as they chatted with each other and Catboy couldn't help but glance at his mentor's bracelet, always clasped onto his wrist, then say to him that his bracelet sure is a cool and special piece of jewelry. With a chuckle, Kwazii thanks Catboy and explains to him that it was was gift from Ariel’s father, King Triton, and also a family heirloom of the royal family of Atlantis. After he had finished telling Catboy about the time he and the Octonauts saved Atlantica from falling apart in a tremor, he (Catboy) was awed by that story and he asks if there are other things about the ocean pearl bracelet, as Kwazii chuckles again, then says that it can also summon heroes who previously wore it before him, the same as Sofia’s amulet, summoned the previous Disney Princesses whenever she faces many problems on her adventures. Fascinated, Catboy says to Kwazii that his bracelet sure has some very interesting powers, and adds that maybe someday, he's meet one of the heroes when the ocean pearl bracelet summons either of them. Kwazii agrees, and notes to his apprentice that maybe he will.

The next day, at school, Connor was looking out into the sky in thought while Amaya was reading and Greg was playing in his iDisney phone.

Powers that Kwazii uses

 * Atlantic Armor
 * Poseidon's Trident
 * Magic Rope
 * Bubble Blast
 * Celestial Whirlwind
 * Magic Vines
 * Flower Power
 * Midnight Magic
 * Lunar Moon Power

Trivia

 * The Octonauts and the Little Mermaid is mentioned in this episode.
 * Will Vandom of W.I.T.C.H. appears in this episode.