Kingdom Hearts 2 PS2 Unlockables

       Bond of Flames
You must finish the fight with Axel in Twilight Town.

Fenrir
You must beat Sephiroth, the optional boss at Hollow Bastion.

Follow the Wind
You must beat Barbossa at Port Royal.
Guardian Soul
You have to beat Hades in the 'Underworld' section of Olympus Coliseum.

Gullwing
Speak to Yuna after beating Hades in the 'Underworld' section.
Hero's Crest
Beat the Hydra at Olympus Coliseum.

Hidden Dragon
Beat Shan-Yu in The Land of Dragons.

Holy Pumpkin
You have to beat the Test Subject in Halloween Town.
Monochrome
Defeat Pete at Timeless River.

Oathkeeper
You must finish Sora's first visit to Twilight Town.

Oblivion
You must beat Xigbar in The World that Never Was.

Photon Debugger
You must finish the Space Paranoids.

Rumbling Rose
You must talk to Beast after returning to Beast's Castle.

Sleeping Lion
You must to Ansem's study in Hollow Bastion.

Star Seeker
You must get Valor Form at The Mysterious Tower.

Sweet Memory
You must finish the 'Spooky Cave' Mini-Game in the Hundred-Acre Wood.
Ultima Weapon
You must get the Ultima Recipe in the basement of the mansion in Twilight Town. Once that's done, you can use the Moogle Shops to synthesize the keychain.

Wisher's Lamp
You must beat Jafar in Agrabah.

Wonders of the Abyss
You must finish Chapter 4 of Atlantica.

Secret Ending
Finish all the worlds and Jiminy's Journal if you're in "standard mode," or just finish all of the worlds in you're in "proud mode."

Chicken Little
You can pick it up in the 100 Acre Wood world. It'll become available after the second cutscene.

Genie
You have to beat the Volcano and Blizzard Lord.

Peter Pan
After the second visit to Port Royal, you'll find it in the ship grevayard.

Stitch
Once you acquire Master Form, you'll find it in the hallway to the computer room in Hollow Bastion.

Gummi Ship Level 2
You must obtain Level 1 with S, A, or B Ranks.

Gummi Ship Level 3
Get through Level 1 and 2 with S, A, or B Ranks.

Special Models
You must obtain S Rank in a gummi ship mission.

Berserk Mode
You must achieve a Metal Level of Level 30.

Hades Paradox Cup
Max out all four drive forms and summons to level 7.