All Working The Tairyou Jigoku Cheats - Playstation 2

Unlockables
Additional "Voice Types" and "Costumes" can be unlocked by getting Normal & Good Endings on each of the game's difficulty levels -- Easy, Normal, and Hard. The Bad Ending doesn't unlock anything.

How to get the three endings:

Bad Ending:
- Collect 15 or less "Usagi no Tegami" (The Rabbit's Letter)
- Throw less than 49 enemies
- Beat the game for more than 3 hours

Normal Ending:
- Collect 15 or less "Usagi no Tegami" (The Rabbit's Letter)
- Throw more than 49 enemies
or
- Collect 16 or more "Usagi no Tegami" (The Rabbit's Letter)
- Throw less than 49 enemies

Good Ending:
- Collect 16 or more "Usagi no Tegami" (The Rabbit's Letter)
- Throw more than 50 enemies

The unlocks can be accessed in the options menu after loading your clear game save file.
"Aomori" Voice Type - Clear "Normal Mode" with "Normal Ending".
"Kikokushijo" Voice Type - Clear "Easy Mode" with "Normal Ending".
"Kyoto" Voice Type - Clear "Hard Mode" with "Normal Ending".
"Okinawa" Voice Type - Clear "Normal Mode" with "Good Ending".
"Osaka" Voice Type - Clear "Easy Mode" with "Good Ending".
"Tokyo" Voice Type - This is the default voice type.
Bunny Girl (Black) - Clear the game with "Good Ending" on any difficulty.
Bunny Girl (Peach) - Clear the game with "Good Ending" on any difficulty.
Bunny Girl (Red) - Clear the game with "Good Ending" on any difficulty.
Maid (Black) - Clear "Hard Mode" with "Good Ending".
Maid (Peach) - Clear "Hard Mode" with "Good Ending".
Maid (Red) - Clear "Hard Mode" with "Good Ending".
School Uniform - This is the default costume.