Bad Boy
When you finish beating the big robot in the Old City go to the airship and press CIRCLE on the Television. go to downtown and blow up the red car. pick up the suitcase and go out the door. It will ask you if you want to steal the money. say Yes and you will get 200,000 instead of 20,000.
Bomb Scare
Talk to the Inspector in the Police Department to be sent looking for "something mysterious" in the Downtown area. There are two bombs for you to diffuse. One is on a roof, and the other is on the ground. If you find them, you will get the Plastque and Bomb items.
Cats-o-Plenty
If you press CIRCLE on the cat in front of the main gate, the game will ask if you want to take it back to Flutter. If you say yes, every time you enter Flutter there will be more and more cats. I currently have about twelve.
Easy Kevlar Omega Jacket
To get easy an easy kevlar omega jacket (reduces 3/4 damage) go to the Yass plains first battlefield. Defeat all the tanks and towers, then go into one of the refuge buildings and come back out. All enemies will revive. Just repeat the process over and over again. The refuge building where the junk store owners is located at the top of the one of the tower platforms. To get there, just go to the far side of the small platform and use the small hill to jump up. You should get all the jackets in a moderate amount of time.
Free Energy In Battle
After you have beaten a robot, a servabot will appear. Shoot it three times before it runs off. Walk over to it and use the triangle button to kick it. A piece of health will appear. This can only be done three times on each servabot.
Hard Mode
For a greater challenge, beat the game then return to the start screen. A new option will appear.
Infinite Zenny
This glitch can be executed after opening the Central Gate (the three doors in the Main Gate opened with the three Sub-City keys). Speak with Data there and say "I keep losing fights...", then "Yes" to his next question, and "No" to his next two questions. As a result, you can repeat this process infinitely, gaining 1,100 Zenny each time.
Note: If you say "Yes" to his third question - the second "No" question - you will earn a total of 56,100 Zenny, but can no longer get Zenny from Data.
Item Combinations
These are the different item combinations you can use to make new Special Weapons, Buster Parts, or Body Parts.
Sub-Quests
Museum Fun:
This will take you some time to accomplish. First, talk to the Painter in the UpTown. Tell her that her painting needs color. Ask the clerk in the clothesstore for her lipstick. Give it to the Painter. This will reveal that she works in the museum. Now you can enter the building. On the second floor, you can place interesting items that you find in the ruins. After you have placed the seven required items, a girl in a green dress will come along and offer to give you the Prizm Crystal. Required items are:
1. Bone
2. Doll
3. Bone
4. Crystal Fossil
5. Reaverbot Eye
6. Antique Bell
7. Giant Horn
Once you have collected these seven items, a girl wearing a green dress will appear. Talk to her to get the prizm crystal.