Natsu Dragneel, Levy McGarden, Yukino Agria, Lucy Heartfilia, & Arcadios vs. Pisces (Eclipse)

Natsu Dragneel, Levy McGarden, Yukino Agria, Lucy Heartfilia, & Arcadios vs. Pisces (Eclipse) is an anime-exclusive fight fought between Fairy Tail Mages Natsu Dragneel, Levy McGarden, Sabertooth Mage Yukino Agria, Blossom Holy Knight Squadron Arcadios and the Eclipse Celestial Spirits Pisces.

Prologue
Hisui and Arcadios are shown walking in a port town with the Princess excited at the sight of the food stores before encountering Natsu, Lucy, Yukino and Happy. After the reunion, Princess Hisui reveals that she is responsible for the havoc of the Celestial Spirits, as the power that got leaked from the Eclipse Gate affected the world, causing the abnormal weather phenomenon across Earth Land and even reached the Celestial Spirit World, causing the sudden coup and rebellion of the 12 Golden Gates. Hisui then shows the group the Celestial Spirit Banishment Keys she invented in order to open or close any of the Golden Gates, thus they don't need to engage in a fight with them. After revealing her true identity as a Celestial Spirit Mage, the keys case is stolen from her by Son Pisces's wind before she could state why they can't be used. Suddenly Mother Pisces appear under the Mages, complimenting her son for his work. Mush to the Mages confusion, the mother and son spirits start arguing, as Yukino tries to persuade them to give back the keys, just to let down by them.

Battle
When the Mother Pisces decides to go, Son Pisces taunts Natsu, inviting him into a fight in which Natsu quickly agrees as he charges at the Eclipsed Spirit. As the son leads Natsu and Happy away, Levy and Yukino tries to help him just to be stopped by the mother. As the son mocks Natsu for willing to use his Magic against him, Natsu readies his fire for the fight just to be put out by the son's Wind Ball, the son then charges at the Dragon Slayer ramming him in the stone.

As Yukino's fight with Mother Pisces begins, the Celestial Mage makes her move, summoning the Bear Cup Polaris, engaging him in a fight with the Shark Spirit. After the bear powers up, Mother Pisces persuades him cunningly to sleep, thus defeating the latter. Mother Pisces then charges at the two girls as Levy attacks her with Solid Script: Water, as water is said to be the former's weakness, but in vain as the Eclipsed Spirit effortlessly drinks it. After Natsu rises up, saying that his opponent's weird talk distracted him, Son Pisces attacks Natsu by a sharp boomerang-like black wind, in which the Fire Dragon Slayer Mage dodges, firing back at him with his Iron Fist before being dispelled by the son's Wind Balls. As the latter continue dispelling Natsu's fire, the two retreat from each other, admiring each other's strength. As Son Pisces elevates away, Happy lifts Natsu and fly after him.

As Levy's attacks don't work on her, Mother Pisces then dives under the ground, this lead Yukino to summon yet another spirit of hers, Deneb. As the Silver Gate expresses his bleak personality, the mother appears all of a sudden behind the Yukino and Levy, leading the Yukino to call for his help. Deneb then, slashes Mother Pisces with his Summer Triangle, sending her away before returning to the Celestial Spirit World. Before Mother Pisces could perform her assault, Arcadios appear out of the blue, forcing the spirit away. Son Pisces keeps running away from Natsu, who then, enraged by his enemy's repeated speech, tries to cast Fire Dragon's Roar at him, just to be driven away by the son's Dread Spiral.

Arcadios continue his fight with the Mother, much to the Mages' impress. She then tries to hit him with her Dorsal Fin, in which he slightly dodges and points his sword to the Shark's neck, acknowledging it as the Eclipsed Spirit's weakness, but his sword breaks upon hitting the spirit's Sharkskin, before she rams through the Holy Knight. Back at the other fight, Natus throws a bucket of water at the son, but it appears effectless, as spirit explains their overcoming their weaknesses since becoming Eclipse Spirits. Natsu then sneakily steals the case and sends the haughty Eclipsed Celestial Spirit away.

After Hisui refuses to hid, Lucy asks her to leave it for her and delivers a Lucy Kick at the Mother, in which she easily smacks the Fairy Tail Mage away. Lucy then summons Plue who preforms a little dance, much to the Mother's amusement. After he is gone, Mother Pisces tells Lucy that it's her turn to dance, just to be hit by Natus's Fire Dragon's Wing Attack. After they reunite, Pisces assault once again the Mages, with Natsu shooting his Fire Dragon's Roar just to be meet with a similar one from the Mother, dispelling each other. She then enlarges her body size slamming it on the Mage, as a result Son Pisces once again pinch the keys and both of the spirits leave in rapid speed.

Aftermath
After the fight, Hisui isn't brought down by the incident and questions about her guard's health, in which he replies that he's fine. Arcadios then confesses that he hid the real keys and gave the Princess fake ones, mush to group's both surprise and relief, Hisui then adds that they knew the location of the place so-called Astral Spirtys. The group then decides to move forward, in their quest to stop Liberum and save the 12 Zodiac Celestial Spirits.