To get Mugetsu without his mask on in survival or
versus mode you have to beat him on the air
carrier with anyone.
You have to beat Echidna when she is with the robots to unlock her in versus and survival mode.
To get the card key, open all three boxes. There's one lunch box on either side of the
seats. Walk up to it, open it & move quickly to the next one. The third box is inside a briefcase at the back of the train, that's where the card key will be.
Kaldea (the Panther) Deaths
Do not use Sion when you get separated or in the ship when fighting Kaldea.
Do not use Sion when you get separated, but use Sion when fighting Kaldea in the ship.
Use Sion when you get separated and in the ship when fighting Kaldea.
Normal ending: Play through story mode, only using Sion.
Wong's ending: Play through story mode, only using Kou or Volt. However, use Sion when fighting Dauragon. Sion will think about his master.
Kaldea's ending: Do not use Sion when you get separated. Use Sion in the ship when fighting Kaldea (the panther) and in the final fight with Dauragon. Sion will remember what Kaldea said.
Dominique's ending: Use Sion when you get separated, when fighting Kaldea (the panther) in the ship, and when fighting Dauragon to see Dominique's story.
Increased Character Rank
Every time story mode is completed, the rank of the extra characters in survival and versus modes will increase. This does not include Volt, Sion, and Kou.
Play As Sion With Black Hood Costume
Successfully complete survival mode by defeating the black-hooded version of Sion to unlock that costume in survival and versus modes.
Play As Kou With MSF Costume
Play through story mode with any character. However, use Kou to infiltrate the Mikado Building. The MSF costume for Kou will now be unlocked in survival and versus modes.
Play As Topless Duragon In Versus Mode
Successfully complete the game three times using any character. After defeating Duragon for the second time, he will get up again and fight topless. Defeat him to unlock that version of him in versus mode.
Play As Wong Leung In Versus Mode
Play through game with any character, but do not use Sion in the fight against Kaldea, and after that fight use Sion to complete the game. After you defeat Duragon for the final time you will view a FMV sequence where you have to fight Wong. Defeat him to unlock her in versus mode.
Play As Leann Caldwell In Versus Mode
Play through the entire game, only selecting Kou. After you defeat Duragon for the final time you will view a FMV sequence where you have to fight Leann. Defeat her to unlock her in versus mode.
At the character selection screen, hold L1, L2, or R2 and choose a person. Note: This has no effect in story mode.
Hidden FMV sequence
Successfully complete story mode with Sion.
Successfully complete story mode to unlock more characters each time that it is finished.