If you wanna get some crystals and don't want to go everywhere and get hurt. In the hillys you can go to a ship, (note: it only works if you see a box on the ship) and fire only at the box it will break open and crystals will come out. This is a way you can get crystals without getting hurt. It takes two or three shots to break the box.
Easy pictures and money
After you get the camera and photograph the beetle, take a picture of the kids, the dog, and Pey'j to get some pictures for the scientific society, and some money. likewise, go to Mammago's and take a picture of one of the attendants; and in the Pedestrian District, take some pictures of the people there. Some might be an "unidentified species".
Soul control
In the battle with the Domz priest, he will eventually tell you that you are out of control with your soul, and the directional controls will be reversed. A practical way to overcome this is to simply flip the controller upside-down.
Unlock Disc Mini-Game
For those of you missing the last mDisk, it is in a locked item cabinet on the Akuda Bar's first floor (by Francis' table).
To get the code, you will need to register on http://darkroom.ubi.com and enter your sixteen character "save code" (this code is generated each time you save the game) to receive the four digit code for that cabinet (it will depend on your game statistics).
Unlock Marble Mini-Game
Get all 88 pearls and a marble mini-game on an mdisk will be available.
Unlocking the Beluga spaceship
The codes to unlock the Beluga spaceship are on the bottom of the Jet Boots. Select them and rotate them to see the codes.