Atlantica
x26 x1 x0

After meeting Ariel and her friends, practice catching Flounder as he swims around (press circle button to rise, square button to dive). After you catch up with Flounder several times, a group of strange Heartless appear that you must defeat in order to proceed.

This world is designed to make using physical attacks difficult, but using offensive magic like Fire, Blizzard, and Thunder is much more effective! The Sea Neons drop lots of MP balls to help keep your MP replenished. Equip the Treasure Magnet ability if you have it!

Swim to King Triton's Throne & Ariel's Grotto

After you defend Ariel from the Heartless, travel through each area and follow the tridents on the walls to reach Triton's throne. When you reach the fast-moving jetstream, hug the right wall nearest you to reach the correct way forward. After meeting King Triton, swim to Ariel's Grotto, which Ariel will point out to you nearby.

Look for a Torn Page in a chest on one of the shelves in Ariel's Grotto! This will allow you to continue the story in the Hundred Acre Wood.

Ride the Dolphin to the Sunken Ship

Leave the Grotto and defeat all of the Heartless in the Undersea Gorge. When the area is clear of enemies, approach the Dolphin and Grab On to it for a few seconds, then press the circle button to dismount. Return to the Calm Depths by passing through the Undersea Cave. There is a purple sea urchin next to the wall; cast Fire magic on it to make it explode, revealing a hole in the wall.

After acquiring the items nested inside them, striking the purple shells in Atlantica will have a 35% chance of dropping HP orbs, and a 5% chance of dropping MP orbs and a Potion.

Exit through this hole to reach the Undersea Valley. You will find the dolphin swimming around in this area; if you approach and Grab On to the dolphin, it will take you to a cave further up the jet-stream that is otherwise inaccessible. When the dolphin drops you off, enter the dark passage in front of you (and don't hang around too long - if you stay in place for a while, the dolphin will exit and push you back into the jet-stream).

Find the Crystal Trident

NEW HEARTLESS: Sea Neon, Aquatank, Screwdiver

Enter the sunken ship through the stairway on the top deck or through the opening on the side of the ship. Open the chest near the far window to obtain the Crystal Trident. Upon approaching the chest, a large shark shatters the window and attempts to bite you; exit the ship to confront the shark.

Striking the barrels and crates inside the ship has a 40% chance of dropping MP orbs. For barrels/crates that drop MP orbs, there is an additional 20% chance at acquiring an Ether.

Shark

Shark

HP: 200      EXP: 100      DIFFICULTY:

This battle can be avoided by escaping into another area; however, the shark must be defeated here at least once in order to enter Ursula's lair later on. The shark attacks with two different bite attacks and a tail swipe, all of which deal heavy damage. Swim to its sides to avoid its bite attacks, and swim towards the screen to avoid its tail. It's highly recommended to cast Aero magic to boost your defense (this reduces damage from incoming attacks by half!).

If you distance yourself far away from the shark, it will sometimes charge at you across the area; if it hits a wall, there's a chance that the impact will leave it dazed - use this opportunity to lands a few hits. The shark will stagger after a combo finisher, but only after swiping with its tail. It typically strikes with three or four bites, followed by a slower (and stronger) bite. The shark is resistant to most magic, but takes standard damage from Thunder magic.

REWARD:  Hi-Potion (100%),  Ether (80%),  Mega-Potion (30%)

Shortcut Back to Ariel's Grotto

Enter the passage at the seafloor of this area; strike the wellspring in this cave to activate a jet stream that leads to the Undersea Valley. Ride the jet stream up and you will hit a large chest that was stuck in the ground; open this chest to receive an Orichalcum.

At this point, the Shark can appear randomly in the Undersea Valley, Undersea Gorge, and Sunken Ship areas. You can defeat it repeatedly to stock up on Hi-Potions, Ethers, and Mega-Potions. You might need a few Ethers for the next boss battle!

Return to Ariel's Grotto and approach the blue trident symbol on the wall. Ariel will leave the party at this time. After the cutscenes, swim to Triton's Palace (located northeast of Ariel's Grotto); it's discovered that the evil sea witch Ursula has stolen the trident, and Ariel will rejoin the party.

To the Sunken Ship & Ursula's Lair

Swim down the hole near Ariel's Grotto to return to the Sunken Ship and examine the white panel on the far wall (behind the broken half of a ship). Sebastian will push it for you, allowing you to make your way to Ursula's lair.

If the Shark reappears at the Sunken Ship during this time, you must defeat it before examining the panel.

When you come to a fork, take the path on the right and you will enter the Cavern Nook. Equip Ethers and save your game. Return to the fork and take the left path until you reach Ursula's lair.

Ursula

Ursula

HP: 450      EXP: 1000      DIFFICULTY:

It's critical to come prepared with Ethers and MP-boosting accessories equipped before entering this fight. Ursula cannot be directly attacked at this point (she will automatically counterattack by spinning whenever she is hit). You will have to lock-on to the cauldron in the center of the room and cast magic on it until it dazes Ursula. Here's what you need to know:

  • Casting 6-8 Fira magic spells is usually the most efficient way to get the cauldron to erupt quickly. You can cast in quick succession or at regular intervals.
  • Casting magic on the cauldron is only effective after Ursula throws her first potion into the cauldron. Your magic spells will NOT have an effect whenever one of Ursula's two magic attacks is actively coming from the cauldron.
  • The color of the cauldron does NOT indicate what type of magic to use on it; the color only indicates which attack spell Ursula will use (see below).
  • If your magic casting keeps getting interrupted by Flotsam & Jetsam's attacks, consider swimming around the base of the cauldron, cast once, and repeat.

After enough magic has been cast, the cauldron will erupt with light and Ursula and her eels will be temporarily dazed during this time. Use this opportunity to attack Ursula up close and relentlessly with the Keyblade. When Ursula recovers, swim away to avoid her spinning attack, then return to casting magic on the cauldron. If you run out of Ethers, you can strike Flotsam and Jetsam up close to restore your MP more quickly.

If Ursula throws potions that make the cauldron turn red, it will eventually bubble over the rim at ground level; swim upward to avoid taking damage. If Ursula's potions turn the cauldron blue, she will eventually summon a large whirlpool in the center, with smaller ones rotating around the outer perimeter; swim to the ocean floor to avoid these.

REWARD:  Sora learns the shared ability Mermaid Kick

Mermaid Kick Through the Jet-Stream

After the battle, Ursula will escape through a blocked passage. Return to the Cavern Nook, equip curative items if necessary, and save your game at the nearby save station. Equip the Mermaid Kick shared ability and return to the Calm Depths (through the upper passage in the Sunken Ship area). Swim against the current of the jet-stream by pressing the circle button repeatedly until you reach a cave on the opposite side that's labeled ???. Enter this cave to encounter Ursula once more.

Giant Ursula

Giant Ursula

HP: 900      EXP: 1500      DIFFICULTY:

This fight can be difficult and tedious due to Ursula's immense size and powerful attacks; the key to avoiding damage is to always stay on the move. The lightning bolts track you and will appear over your head every few seconds; strike Ursula's face up close with the Keyblade twice, then move to a new position to avoid the next bolt and repeat. Cast Aero magic to boost your defense against Ursula's attacks (it cuts damage taken in half!); this may allow you to keep attacking without having to heal as often. Equiping thunder-resistance accessories like the Thundara Ring can help limit the damage you take immensely.

You can avoid Ursula's bubbles by swimming up or to either side; swimming up over them is ideal, as it puts you closer to Ursula to strike. When Ursula opens her mouth to pull you in, swim away from her using Mermaid Kick (if possible, try to keep close to her without making contact; this will give you more time to attack afterward). When she fires a beam from her mouth, you can use Mermaid Kick to swim to the sides, or try to swim behind her head and strike her from that position.

In some cases, you can use Mermaid Kick (or swim up and over) to reach the back of Ursula's head; this position keeps you safe from her bubbles, beam, and inhalation attacks (but the consistent thunder bolts will still track you there, so small movements left and right are necessary to dodge those). When half of Ursula's HP is depleted, she will begin to use a series of powerful lightning strikes that inflict heavy damage. Whenever you hear "This won't be pretty!", swim away from her immediately.

REWARD:  Sora learns the magic spell Thundara, Ansem Report 3

After defeating Ursula, return to Ariel's Grotto with the Trident in order to seal the Keyhole. Ariel will give Sora the magic-boosting Crabclaw keychain. Return to the gummi ship through any save station and travel to the world above Agrabah.

The Heartless will no longer appear in Atlantica until you leave the world via save station; this is a great opportunity to swim through each area and collect treasures you might have missed!