Washing Machine Kiryu in Yakuza 3:
If you go into serena, there will be a framed photo of Nishiki on the back wall. If you enter first person and look at it the Nishiki photo will talk to you and ask you to complete a handful of jigsaw puzzles. They each unlock a new power up for kiryu, but the final one gives you a special code: "kiwamisecret5". If you go back to the beach in Okinawa, you can go inside the sand castle. You must enter the code by dropping fishing bait on the lettered and numbered tiles to spell out the code. Once you have done so, kiryu will be transformed into an invincible washing machine.
Notes:
You MUST complete the puzzle in order for the code to work, or the ghost of Nishiki will appear and tell you off for looking up cheats on the internet.













