Defeating the Ghosts
Here's how to defeat all the ghosts:

- Fatso near kitchen (feed him hamburgers)
- Stinky (spray perfume on him)
- Stretch (use glue)
- Fatso in bathtub (use camera)
- General Fatso (use wind up key then hammer the tanks)
- Farmer Stinky (use hammer and chisel to carve the stone in Caspers Image)
- Graveyard Stretch (Use twister morph to lure him into grave dig site)

Drift:
Go to the topleft corner of any room. Press and hold : (up + left) + L1 + R1 + Start. If done correctly, the game should freeze. Then release (up + left) and L1. While still holding R1 + start, press (down + right) and then press triangle. The game should then unfreeze and you should have the ability to drift over any wall by pressing R1. The L1 button will bring you back down.

Fast Casper
To make Casper travel like a speeding bullet, press triangle + X,R1,R1,R1 at any point during the game (while accessing this cheat, you would be transported to the inventory) - From Yna Sarah

Secret Room:
On level one, go all the way up the stairs and turn left, then use the "Drift" cheat and drift over the walls and go down. There is a secret room

Refill Health
Enable Drift Mode. After the graphics are jammed, press DOWN and RIGHT twice to get life. You can repeat this again and again. Press TRIANGLE to resume the game.