The Gummi Ship then stopped on a World filled with Water.
"Okay guys, prepare for landing." Said Donald.
"Land where?, in the sea, we'll drown!" Yelled/Asked Kyle.
"Not with my magic, we won't, just leave it to me." Said Donald.
They later entered the World with Kyle and Cloud with fins, Donald as an octopus and Goofy as a turtle.
They began to swim around for a while.
A girl with red hair and green flipper followed by a red crab and a yellow fish with blue sides.
"Come on, Sebastian!" Yelled the girl.
"Ariel wait!, slow down!" Yelled Sebastian.
"Don't leave me behind!" Yelled Sebastian as he failed to catch up to Ariel and the yellow fish.
Sebastian then looked into Donald's eyes.
A moment later Sebastian then screamed.
They later went to Donald.
Sebastian then ran towards Ariel.
"Relax, Sebastian." Said Ariel.
"They don't look like one of them." Said Ariel as she looks at them.
Ariel then looked at the yellow fish.
"Right, Flounder?" Asked Ariel.
Flounder then looked at them.
"I don't know, there's something weird about them." Replied Flounder.
"What do you mean?" Asked Kyle.
Ariel then looked closer at Kyle.
"They do seem... a little different." Replied Ariel as she swam around him.
"We're from kind of far away." Said Kyle.
"And we're not really used to these waters." Said Kyle.
Kyle then laughed nervously.
"Oh, I see, in that case." Said Ariel.
"Sebastian can show you, how we swim around here." Said Ariel.
Sebastian then went to Ariel.
"Ariel, King Triton will not like this!" Yelled Sebastian.
"Oh, don't worry." Said Ariel.
Ariel then swam away.
"Easy for you to say... Okay, it's time you learn how to swim properly." Said Sebastian.
After learning the instructions.
"Practice swimming with Flounder, try to tag him." Said Sebastian.
"All right, begin." Said Sebastian.
They later tagged Flounder and soon mastered their swimming ability.
"Good job." Said Sebastian.
"Now let's move on to self-defence." Said Sebastian.
"Sebastian!" Yelled Ariel.
Sebastian then looked as Ariel then pointed at octopus like Heartless swimming towards them.
Ariel, Flounder and Sebastian then swam away.
"Class is over!, good luck!" Yelled Sebastian.
Ariel, Flounder and Sebastian later hid.
Kyle, Cloud, Donald and Goofy later took out their weapons and defeated the Heartless.
Soon all the Heartless were defeated.
Ariel, Flounder and Sebastian came out of hiding.
"Those things chased after us." Said Ariel.
"Oh no!, those monsters might be heading for the palace too!" Yelled Sebastian.
"We'd better head back, now!" Yelled Ariel.
"But wh-what if we run into more on our way back?" Asked Flounder as he was nervous.
Ariel then looked at them.
"I'm sorry, but we need your help, please come to the palace with us." Said Ariel.
Ariel then pointed to the yellow markings.
"The Trident markers on the wall, points the way there." Said Ariel.
"We won't get lost as long we follow them." Said Ariel.
"Okay let's get going." Said Ariel.
After some time of following the markers and fighting Heartless they soon found the Palace.
They were later running away from the Heartless.
A bright yellow beam then hit the Heartless causing them to disappear.
"That was too close." Said a man.
Ariel then turned around and swim towards a man with white beard and hair with a blue fin and a yellow crown.
"As long as I have my Trident." Said the man.
"I will not tolerate those creatures inside the Palace." Said the man.
Ariel then swam closer to him.
"Daddy!" Yelled Ariel.
"Oh, Ariel!" Yelled the man.
Ariel then cower in fear.
"When will you listen?, it's dangerous out there!" Asked/Yelled the man.
Ariel then rolled her eyes and sighed.
"Strange creatures lurk outside." Said the man.
Sebastian then cleared his throat.
"Behold, you swim before the ruler of the seas: his majesty, King Triton." Said Sebastian.
"And who are they?" Asked King Triton.
"They helped us fight off those creatures." Replied Ariel.
"They don't look familiar." Said King Triton.
"We're from an ocean, very far away." Said Kyle.
Goofy then swam around.
"Yup, we came to find the Keyhole." Said Goofy.
"The what?" Asked King Triton.
"What's that?" Asked Ariel.
"Well it's a-" Said Goofy but was cut off by King Triton.
"There's no such thing." Replied King Triton.
"Certainly not here." Said King Triton.
"But Daddy." Said Ariel.
King Triton then glared at her.
"Ariel, not another word!" Yelled King Triton.
"You are not to leave the Palace, is that clear?" Asked King Triton.
Ariel then glare at him and swam away.
The others soon followed her.
King Triton then shook his head and sighed.
"Perhaps, I'm being to strict." Said King Triton.
"I'm just concerned for her safety." Said King Triton.
"Of course, your majesty." Said Sebastian.
"But I must admit, now I'm quite curious about this Keyhole." Said Sebastian.
"That need not concern you, Sebastian." Said King Triton.
"Have you anything to report?" Asked King Triton.
"Just as you suspected, your majesty, they seem to coming from Ursula's grotto." Replied Sebastian.
"I knew it, that sea witch is up to no good again." Said King Triton.
King Triton then stoked his beard.
"I see exile from the Palace has taught her nothing." Said King Triton.
Sebastian then rose to King Triton.
"Yes, she poses serious danger." Said Sebastian.
"And I told you to keep Ariel away from such danger, did I not?" Asked King Triton as he looked at Sebastian.
"Your majesty, please, I uh." Said Sebastian as he tried to think of something.
They soon were out of the Palace.
"Come to my grotto, I want to show you something." Said Ariel.
Ariel then pointed a large rock on the ground.
"There it is, see?" Asked Ariel.
Kyle then moved the huge rock to reveal a cavern.
They were soon inside and searched around it.
"Look at all the wonderful things Flounder and I've collected." Said Ariel.
"I think it's all from the outside World." Said Ariel.
"Someday, I'm going to see what's out there." Said Ariel.
"I want to see other Worlds, does that sounds strange?" Asked Ariel.
"No, not at all." Replied Kyle.
"I used to feel the same way." Said Kyle.
"Used to?" Asked Ariel.
"I mean, I still do." Replied Kyle.
"Hey, why don't we try looking for that Keyhole you were talking about?" Asked Ariel.
"But your father said-" Said Kyle but was cut off by Ariel.
"Oh, he treat me like a little girl." Replied Ariel.
"He never wants me to do anything." Said Ariel.
"He just... he just doesn't understand." Said Ariel.
Everyone was unawhere that Sebastian was eavesdropping.
After they left the grotto two eels with one yellow eye came.
A hologram with Kyle with the Keyblade and Ariel was swimming.
A woman was laughing.
"Those impudent fools will never find the Keyhole." Said the Woman.
The woman then waved her arm.
"But the girl could prove useful." Said the woman.
Another hologram of Ariel then came up.
"And I've got the Heartless on my side." Said the woman.
"Triton, my old friend, your day is coming." Said the woman.
The woman was an octopus with white hair and with a golden seahorse shell with red lipstick.
They later found a sunken ship.
When they were about to reach a chest a Shark then came by and nearly chomped them.
The Shark later swam away.
They later found a crystal trident head and took it.
"Hm, it's shape reminds me of something." Said Ariel.
They soon left the ship and went back to the grotto.
Kyle then put the crystal trident into the one on the wall.
"Ariel, you've disobeyed me again!" Yelled King Triton.
They saw King Triton entering the grotto.
"I told you not to leave the Palace!" Yelled King Triton.
King Triton then widen his eyes as he saw the crystal Trident.
King Triton then raised his Trident and it glowed.
"Daddy, no!" Yelled Ariel.
The Trident then glowed a bright beam hit the crystal Trident and destroyed it.
"How could you?" Asked Ariel.
Ariel then glare at him and swam away.
"Young man, you're not from another ocean, you're from another World." Said King Triton.
"Aren't you?" Asked King Triton.
"Huh?" Asked Kyle.
"Then you must be the Key bearer." Replied King Triton.
"How did you know?" Asked Kyle.
"You may fool Ariel, but you can't fool me." Replied King Triton.
"You don't know your dorsal fin from your tail." Said King Triton.
Kyle then sighed.
"As the Key bearer you must already know, one must not meddle in the affairs of other worlds." Said King Triton.
"Of course I know that, but-" Said Kyle but was cut off by King Triton.
"You have violated this principle." Said King Triton.
"The Key bearer shatters peace and brings ruin." Said King Triton.
"Aw, Kyle's not like that." Said Goofy.
"I thank you for saving my daughter, but there is no room in my ocean for you or your key." Said King Triton as he turned around.
King Triton then leave the grotto with Sebastian.
Kyle then looked at the Keyblade.
Meanwhile Ariel was crying on the rock.
The two eels then came to her.
"My, my, the poor child suffers such deep sorrow." Said one of the eels.
They later swam around her.
"What a pity, if only there were something we could do." Said the eel.
"Wait, maybe she can be of some help." Said another eel.
"Yes, maybe she can be of some help to you." Said the other eel.
"Who're you talking about?" Asked Ariel.
"Oh, she would surely help you." Said the eel.
"She'd make all your dreams come true." Said the other eel.
They later twirled around to make a black smoke.
"Ursula can help." Said the eel.
Ariel was then saw Ursula arrive from the smoke.
"You called, my dear?" Asked Ursula.
"You're Ursula?, I was just wondering if-" Said Ariel but was cut off by Ursula.
"It's all right, helping others is what I live for." Said Ursula.
Ursula then looked at Ariel.
"Let me guess, you wish to see other Worlds, that shouldn't be too hard." Said Ursula.
"After all, your new friends came from another world." Said Ursula.
"What?" Asked Ariel.
"But they had special help, that mysterious key." Replied Ursula.
Ariel then sighed.
"Now, now cheer up, sweetie." Said Ursula.
"You have something special too." Said Ursula.
"Huh?" Asked Ariel.
Ursula then moved closer to Ariel.
"Now listen carefully." Said Ursula.
Everything went black.
Ariel then went to the Palace.
"I think the Keyhole they seek is somewhere in the palace." Said Ursula.
"Now, my dear, if you can take me there without your daddy knowing." Said Ursula.
Ariel then turned around to see Ursula come from behind a pillar.
"I can help you get to these other Worlds you long for." Said Ursula.
Kyle, Cloud, Donald and Goofy later went back to the palace.
Ursula was holding the Trident while laughing.
"The Trident is mine at last!" Yelled Ursula.
King Triton was lying on his seat with Ariel beside him
"And I couldn't have done it without your help, my dear." Said Ursula.
"Ursula no!, I didn't want this!" Yelled Ariel.
"Why not?" Asked Ursula.
"Aren't you tired of following your dear daddy's orders?" Asked Ursula.
"Oh, yes, we had a deal, didn't we?" Asked Ursula.
"Time for a little journey, to the Dark world of the Heartless!" Yelled Ursula.
"We cannot find the Keyhole." Said the eel.
"The Keyhole is not here." Said the other eel.
"What?!" Asked/Yelled Ursula.
Ursula then turned around to see the others.
"Why, we have company." Said Ursula.
"I'm afraid you're a little late, handsome!" Yelled Ursula.
Ursula and the eels disappeared.
They later saw King Triton and Ariel.
"Daddy!" Yelled Ariel.
"The Trident, we must get it back." Said King Triton weakly.
Kyle then turned to Donald.
"Come on, let's go!" Yelled Kyle.
They soon left.
Ariel was then in front of Kyle.
"Wait, I'm going with you!" Yelled Ariel.
"My father is hurt and it's all my fault." Said Ariel.
"I have to stop Ursula!" Yelled Ariel.
Everyone then nodded.
"That's right, I'm right behind you, Ariel." Said Sebastian.
"Ursula draws her power from her cauldron." Said King Triton.
"To defeat Ursula, you must strike her cauldron with magic." Said King Triton.
They soon went back to the sunken ship and saw something behind it.
"Need some help?, I'll show you how it's done." Said Sebastian.
Sebastian then pushed a button.
A boulder that was in front of them then went down.
They soon went inside and found Ursula's lair.
They soon went inside.
Ursula saw them.
"Come out!, you can't run!" Yelled Donald.
Sebastian then came from Donald's head.
"Your time has come!" Yelled Sebastian.
Ursula then came out of her hole and gave them a fearful glare.
Donald and Sebastian screamed at the same time.
Ursula then threw a potion into her cauldron and turned red.
Kyle then used a fire spell to counter and hit Ursula.
Ursula was then knocked unconscious and Kyle then swiped his Keyblade at her.
The eels disappeared.
Ursula then gasped.
"You'll pay for this!" Yelled Ursula as she went back inside her hole.
"Let's go, we must get that Trident back." Said Ariel.
They were soon in the middle of nowhere after going back to the sunken ship and found another cavern.
"You pathetic fools!, I rule the seas now!" Yelled Ursula with the Trident in her hand.
Ursula then spin around and soon grew.
"The sea and all it's boils, bow to my power!" Yelled Ursula.
They soon attacked her head and soon defeated her.
Ursula then disappeared while scream while the Trident then appeared in bright yellow light.
They soon retrieved the Trident and gave it back to King Triton.
"Daddy, I'm so sorry." Said Ariel.
"Please don't be angry with her." Said Kyle.
"It's my fault, you followed Ursula because, I wouldn't let you follow your Heart." Said King Triton.
"And when you found that crystal, I lost my temper and destroyed it." Said King Triton.
"Oh, yeah, the crystal!, why did you destroy it?" Asked Cloud.
"That Crystal held the power to reveal the Keyhole." Replied King Triton.
"They Keyhole Is dangerous, I had to keep you away from it at any cost." Said King Triton.
"Daddy." Said Ariel.
"Key bearer, I have one more request: Seal the Keyhole." Said King Triton.
"My Trident also holds the power to reveal the Keyhole, will you do it?" Asked King Triton.
"Of course, that's what we had in mind from the start." Replied Kyle.
"Where is the Keyhole, daddy?" Asked Ariel.
"You should know better then anyone." Replied King Triton.
"It's in your grotto." Said King Triton.
"Really... Kyle let's go." Said Goofy.
Kyle's thunder has been upgraded to Thundara.
They soon went back to Ariel's grotto.
Ariel then held up the Trident.
The Trident then glowed and lifted itself to the place where the crystal was.
The Trident thing on the wall then glowed.
The Keyhole then revealed itself on a piece of a window.
Kyle then raised the Keyblade and bright beam came from it and hit the Keyhole and was then locked.
The Keyhole then disappeared.
Ariel then went to Kyle.
"Tell me, Kyle, your world, what's it like?" Asked Ariel.
"Oh, about that... sorry for lying to you." Replied Kyle.
Ariel then chuckled.
"It's okay." Said Ariel as she smiled.
"Besides, if you can travel through other Worlds, maybe I can too." Said Ariel.
Ariel then spin around.
"So many place I want to see, I know I'll get there someday." Said Ariel.
"I'll find a way somehow." Said Ariel.
"I'm sure of it." Said Ariel.
"Well, if you do find it, do me a favour and leave me out of it." Said Sebastian.
They soon left Atlantica.