Kingdom Hearts: how to unlock the secret ending, Sephiroth and secret bosses
How to unlock the original Kingdom Hearts secret ending, the Sephiroth and Ice Titan fights, Kurt Zisa, the Phantom and key Keyblades.
Original 2002 PlayStation 2 release (North America and Europe). Kingdom Hearts Final Mix and the HD 1.5 ReMIX collection add content and are outside this guide; world screenshots that appear to come from the HD release are labelled.
Secret ending
On Normal mode, seal every keyhole (including the Hundred Acre Wood book), rescue all 99 Dalmatians and win the Hades Cup, then beat the game. The secret movie plays after the credits. On Expert mode, finishing the game is enough.
Sephiroth

After sealing the Hollow Bastion keyhole, the Platinum Match opens at Olympus Coliseum. Sephiroth is the hardest optional fight; defeating him earns the One-Winged Angel Keyblade.
Ice Titan
Win the Hades Cup to open the Gold Match at the Coliseum, where the Ice Titan waits.
Kurt Zisa
After Hollow Bastion, talk to the Magic Carpet in Aladdin's house in Agrabah to fight Kurt Zisa in the desert.
The Phantom

After Hollow Bastion, go to the Clock Tower in Neverland to face the Phantom against a time limit.
Keyblades worth unlocking
Oblivion is in a chest in Hollow Bastion, reached late in that world after the fight with Riku. Metal Chocobo comes from the Hercules Cup, and the Ultima Weapon is made by the Traverse Town moogles once you have the materials.
Collect Dalmatians as you go: they are hidden in chests across every world, and Pongo and Perdita's house in Traverse Town tracks your total.
Picture details
Game artwork belongs to its respective rights holders.
