Sonic Underground: Once Upon a Prince

Sonic Underground: Once Upon a Prince is a made-for-TV movie that aired on July 7th, 2014, and serves as the pilot for the follow-up series.
== Premise ==
In Mobius, after suffering a near-death experience, Sonic, Sonia, and Manic's mother, Queen Aleena, perishes. They are sent to live with Lady Windermere and her children Tails, Amy, Knuckles and Rouge. Many years later, the siblings attempt to challenge the law of no music in the outside world using their medallions, but when Sonic makes a deal with an evil sea witch, she takes away his voice for herself and explains he has three days to get the one princess he likes. Sonic matures into a siren for these days, and once the sun sets on the third day, he will turn into a full siren. Now, his siblings have two choices: save their friend, or defeat Stella to unban music from Mobius.
== Plot ==
When Crown Prince Sonic of Mobius was five, he, his siblings Sonia and Manic, and their mother Queen Aleena were swept away in a tidal wave that drowned them. Sonic and his siblings were miraculously brought back to life, but their mother unfortunately perished. During this time, Sonic, Sonia and Manic were forced to live with Lady Windermere in a far-off place with her five-year-old children Amy, Rouge, Knuckles, and Tails. Ten years later, Lady Windermere holds a concert in her name, performed by her seven children and the concert composer Carla ("Children of Lady Windermere"). The concert goes as it was planned to, until it is discovered that Lady Windermere's oldest child Sonic is not there, much to her anger.
As it turned out, Sonic was out underwater excavating a ship graveyard with his best friend, Shadow. Inside one wreck, he finds a pipe and a fork, which fascinates his curiosity, all the while unaware of a shark watching him and Shadow from outside. The shark bursts into the room that Sonic and Shadow are in and gives chase to them all across the graveyard, until the two manage to get the shark ensnared in an anchor ring. They then make their way to the surface, where their friend, a seagull named Scarlet, lives. Sonic asks Scarlet to tell him what the items he collected are. She describes the fork as a dinglehopper, an item mobians use to style hair, and the pipe as a snarfblatt, and object for making music. Upon hearing the word "music", Sonic is quickly reminded of the concert he missed and makes haste back home. However, he fails to notice he is being watched by two suspicious female eels by the name of Trixie and Dixie. The two are spies under the employ of Stella the Sea Witch, a member of Lady Windermere's court before being banished. Stella hates Lady Windermere with a passion for her sirens towards her and constantly schemes of ways to exact revenge. The moment Sonic caught her eye, Stella commanded her cronies to watch him, hoping to use him to get to Lady Windermere.
Back home, Lady Windermere and Carla are scolding Sonic for missing the concert. But Shadow moves in to defend him, accidentally letting slip them going to the underwater world and the encounter with Scarlet, which quickly angers Lady Windermere. The law forbids going down to the underwater world for fears of mobians being caught by humans. But Sonic believes humans to be not that bad, which angers Lady Windermere to the point of telling him that as long as he is living in her home right now, he will do what she says and what he does not want. This statement sends Sonic away crying with Shadow following after. When the two leave, Lady Windermere asks Carla if she went too hard on Sonic, to which Carla replies "definitely not". Carla suggests that Sonic needs constant supervision, which gives Lady Windermere the idea to send Carla to keep an eye on him. Carla complies with the woman's demands, but feels dissatisfied with the idea of "tagging along some headstrong teenager". However, Carla's thoughts are interrupted when she sees Sonic and Shadow walking off elsewhere, prompting her to follow them.
Carla is lead to a hidden mountain grotto where she discovers a variety of objects from the underwater world gathered together. Still hurt by his mother's words and not trusting her, Sonic sings of his collection of underwater objects, and how he desires to visit the underwater world, despite what his mother had to say of it("Part of Their World"). The mood is quickly broken by Carla crashing in, and threatening to reveal Sonic's grotto to Lady Windermere. Sonic tries to resolve with her, but before anything could be resolved in the conflict, a large object is seen from one of the grotto's windows. Sonic, being ever curious, goes to the ocean to figure out what this massive object is. The object proves to be a human ship, shooting fireworks into the night sky. Sonic swims toward the vessel, in spite of Carla's protests, and climbs aboard. Sonic learns that the humans aboard are celebrating the birthday of their princess; one creature that catches his eye is Mira, the sheepdog who takes a liking to Sonic. But Sonic is left enamored when he sees the dog's master, Princess Jazzy, who receives a large, gaudy statue of herself as a birthday present, from Rikki, who sourly proclaims that she hoped it would be a wedding present. Jazzy protests that she had just not found the right prince yet, but insists that if it does it will hit her like lightning. Out of nowhere, the sounds of thunder echo in the distance, followed by an ever-growing gust of wind. Without warning, a hurricane blows in, sweeping up both ship and crew violently in a volley of wind and water. The crew rushes to batten the hatches down, but to no avail. Sonic is thrown off the vessel but manages to catch sight of the ship being struck by lightning, setting it on fire. When the ship crashes into a gaggle of rocks, the crew is sent overboard, along with the statue of Jazzy. Though they all abandon ship and make it to the lifeboats, Jazzy discovers that Mira is still on the burning vessel and goes to rescue her. Unfortunately, while Jazzy manages to get Mira to safety, she cannot save herself we she gets blown away by a massive explosion caused by the onboard gunpowder and lands into the ocean below underwater. While he witnesses this and rushes toward her aid, Sonic rescues Jazzy and takes her back to the surface.
Once at the surface, Sonic sings of his desire to join Jazzy's world before fleeing at the sounds of Rikki and Mira approaching. While Sonic sings, Jazzy only manages to catch a glimpse of him before he leaves; but as Rikki raises her up, Jazzy vividly remembers a hedgehog who had saved her and is determined to find him. As Sonic watches them from a nearby rock, Carla tells her that the situation must be kept secret from Lady Windermere, but Sonic does not pay attention. Instead, with vigor and determination, Sonic makes a bold proclaimation that he will be part of Jazzy's world. However, what Sonic does not realize is that he's being watched by Stella's eels. Stella is gleeful of the situation and eerily looks to a gaggle of sirens in her lair, all of the former dreamers who came to her power. She then mutters about Sonic becoming a charming addition to the group. 
More TBA
Scarlet gathers Sonia, Manic, the children of Lady Windermere (Tails, Amy, Knuckles and Rouge), and lagoon and sea creatures of all sorts (including bluebirds, flamingos, pelicans, lobsters, starfish, dolphins and seals) to converge on the wedding ship just as the wedding is underway. There is a little warning for Stella when the attack begins, and the ship is sent into disarray, giving to Sonic the time he needs to get aboard. Moreover, Stella is utterly flustered, disoriented, and sidelined from being able to do anything. With the help of Mira, Scarlet manages to snap the necklace off of Stella's neck. Scarlet then says that Stella does not need it anymore, and shatters it, which gives Sonic his voice back and in addition, foiling Stella's plans and releasing Jazzy from the spell. Jazzy finds Sonic and admits he is the one who saved her earlier, but Stella warns Jazzy to leave Sonic alone before realizing she has her own voice again after the necklace had broke. But, before Sonic and Jazzy can exchange hands, the sun sets, transforming Sonic into a full siren. Stella transforms back to her true self, grabs Sonic and jumps into the sea with him. The final battle begins when Stella bans Sonic from ever going back to the surface. Stella wants to stop them so that she can be the "queen of the seas" and a struggle ensues. The children of Lady Windermere save Sonic from being murdered by Trixie and Dixie. The battle ends when when Stella almost ends up killing Sonia and Manic, but Sonic pushes the two away, getting hit in the process, and faints. Lady Windermere arrives just in time to witness this, and is remorseful for her actions. She then fights Stella, but loses on a landslide. Stella then announces herself as the "queen of the seas", and enlarges herself. Sonic wakes up just in time to witness this, and swims back up to the surface to save Jazzy. Sonic jumps onto Jazzy's boat, just as the giant Stella, the size of a kraken, emerges, leaving Sonic and Jazzy helpless to her power. During her rampage, Stella creates a whirlpool, raising shipwrecks from the ocean floor. Jazzy pulls herself into the ship with a splintered bowsprit. Saving himself from Stella, who tries to sabotage him, Sonic avoids her trident's blast and begins to escape. Just as Stella is about to destroy Sonic with the trident's blasts, Jazzy saves Sonic and kills Stella by ramming a splintered bowsprit towards the evil witch's abdomen. Stella dies by blowing up into a scattered mass of organs. While Sonic is safe from harm, Jazzy makes it to the surface and passes out. After Stella is murdered, her siren spell is lifted on all of the mobians she captured, including Sonic, who reverts back to his original self, and peace is once again restored to Mobius as a whole.
Back on the surface, Lady Windermere observes Sonic looking at Jazzy and realizes he does love her. After talking with Carla, Lady Windermere decides that she has to let Sonic be free to lead his own life and tells Carla she will miss him. She then transforms Sonic into a half-hedgehog-half-siren, permanently. Lady Windermere then sends Sonic to Jazzy to be together again. Jazzy asks Sonic to marry her, to which he agrees - the two finally kiss, and they are immediately wed shortly after. At the ceremony, after Sonic and Jazzy are married onboard the ship along with Sonia and Manic, the siblings bid Lady Windermere and her children farewell to live their new life in Jazzy's world. But not after Carla is chased by Chef Starla once again in an attempt to cook her. This time, Carla manages to outsmart her. The TV movie ends with the wedding ship sailing away under a rainbow that Lady Windermere makes with her wand, music being unbanned from Mobius, and Sonic and Jazzy kissing as the screen fades to black.
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