Olympia

 The Olympia (パワーオブヒーロー) is a Keychain for Sora's and the Player's Keyblade that appears in Kingdom Hearts, Kingdom Hearts: Chain of Memories, Kingdom Hearts Re:coded, and Kingdom Hearts χ.

In Kingdom Hearts, the Olympia is in a chest at the Coliseum: Lobby, but the chest will not open until Sora completes the Phil Cup, Pegasus Cup, and Hercules Cup. In Kingdom Hearts: Chain of Memories, the Olympia is the signature Attack Card for Olympus Coliseum.

In Kingdom Hearts 358/2 Days, during Roxas's dreams of when Sora defeated the World of Chaos at Kingdom Hearts, the Keyblade is in its Olympia form.

In Kingdom Hearts Re:coded, the Olympia is received after Data-Sora defeats Hades in Olympus Coliseum.

Design
The handle and sides of the Olympia's guard are grey columns. The base of the guard is white, and the top of the guard resembles two white arms flexing their muscles. The shaft of the Keyblade white with grey edges and "Hercules" engraved into the white section. The teeth are set very high on the Keyblade, and are attached to the tip. They resemble clouds. The Olympia as a whole is meant to resemble Greek architecture, and appears to be carved from marble. The Keychain is made of several silver links, save for the first one, which is gold, and the token is the Olympus Stone.

The Olympia's name references an ancient Greek city of the same name, which was where the first Olympic Games were held.

The names of the Olympia's leveled-up forms in Kingdom Hearts Re:coded are based on the letters from the Greek alphabet; (α),  (β),  (γ), and  (Σ).

Kingdom Hearts χ [chi]
   
 * +1: Mythril Shard ×5, Mythril Stone ×5, Mythril Gem ×5, Mythril Crystal ×5
 * +2: Mythril Shard ×5, Iron Ore ×30
 * +3: Mythril Shard ×5, Embers ×20, Burned-out Coal ×15
 * +4: Mythril Stone ×5, Heat-tinged Sand ×30, Star-shaped Sand ×10
 * +5: Mythril Stone ×5, Pure Water ×20, Swamp Spring Water ×20
 * +6: Mythril Stone ×5, Copper Ore ×20
 * +7: Mythril Gem ×5, Burned-out Coal ×20
 * +8: Mythril Gem ×5, Silver Ore ×20
 * +9: Mythril Crystal ×5, Gold Ore ×15, Teardrops ×10
 * +10: Mythril Crystal ×10, Mythril Gem ×10, Mythril Stone ×10, Mythril Shard ×10
 * +11: Orichalcum ×3
 * +12: Mythril Shard ×5, Iron Ore ×30
 * +13: Mythril Stone ×5, Embers ×30, Burned-out Coal ×20
 * +14: Mythril Stone ×5, Heat-tinged Sand ×30, Star-shaped Sand ×20
 * +15: Mythril Gem ×5, Pure Water ×20, Swamp Spring Water ×33
 * +16: Mythril Crystal ×5, Copper Ore ×30
 * +17: Mythril Stone ×5, Burned-out Coal ×30
 * +18: Mythril Stone ×5, Silver Ore ×20, Pure Water ×35
 * +19: Mythril Shard ×5, Gold Ore ×20, Teardrops ×10, Star-shaped Sand ×30
 * +20: Mythril Crystal ×20, Mythril Gem ×10, Mythril Stone ×10, Mythril Shard ×10
 * +21: Orichalcum ×5
 * +22: Mythril Shard ×5, Iron Ore ×30
 * +23: Mythril Stone ×5, Embers ×30, Burned-out Coal ×20
 * +24: Mythril Stone ×5, Heat-tinged Sand ×30, Star-shaped Sand ×20
 * +25: Mythril Gem ×5, Pure Water ×20, Swamp Spring Water ×33
 * +26: Mythril Crystal ×5, Copper Ore ×30
 * +27: Mythril Stone ×5, Burned-out Coal ×30
 * +28: Mythril Stone ×5, Silver Ore ×20, Pure Water ×35
 * +29: Mythril Gem ×5, Gold Ore ×20, Teardrops ×10, Star-shaped Sand ×30
 * +30: Mythril Crystal ×20, Mythril Gem ×10, Mythril Stone ×10, Mythril Shard ×10
 * +31: Orichalcum ×8
 * +32: Mythril Shard ×7, Iron Ore ×30
 * +33: Mythril Stone ×7, Embers ×30, Burned-out Coal ×20
 * +34: Mythril Stone ×7, Heat-tinged Sand ×30, Star-shaped Sand ×20
 * +35: Mythril Gem ×7, Pure Water ×30, Swamp Spring Water ×33
 * +36: Mythril Crystal ×7, Copper Ore ×30
 * +37: Mythril Stone ×8, Burned-out Coal ×30, Underworld Stone ×10
 * +38: Mythril Stone ×8, Silver Ore ×20, Pure Water ×35, Underworld Flame ×20
 * +39: Mythril Gem ×9, Gold Ore ×20, Star-shaped Sand ×30, Underworld Water ×10
 * +40: Mythril Crystal ×20, Mythril Gem ×15, Mythril Stone ×15, Mythril Shard ×15