I have discovered the great 3 glitches. One makes you lose 5 points of life, one gets you to SHORESIDE VALE and the last one is just plain fun.
You must be in PORTLAND for this one. Go to PORTLAND DOCKS. There is a entrance leading onto the road. DO NOT ENTER. On the right there is a chickenwire fence. If you run so that you are scraping against the fence but still going right you will find it. You will fall into 'BLUE HELL' waving your arms. About 5 seconds later you will see yourself getting up from the pavement with 5 points of your life gone.
P.S. THIS CHEAT DOES WORK!!!!!!!!!!
You will need to have 'GOOD DRIVING SKILLS' cheat on for this. You need to be in STAUTON for this. Get a kuruma( a smooth looking car) and drive to the hostpital. In the car park there is a low roof. You can jump onto it using your car. If you go left there is a hidden package. Get it. Get back in your car and position it so that your car is straight and the wall is behind you. Reverse and wham into the wall. Keep reversing and you will slide through the wall and land in the tunnel.
P.S. Behind you the blue wall is there. Its fun watching the cars smashing into it.
You need to be in PORTLAND for this one. Drive to ATLANTIC QUAYS and go to where you drop Misty off at the party. On your right there are some garages. There furtherest one away has a door big enough to get a linerunner through. Walk/drive staight at the door. You will pass through like a ghost.
P.S. I parked my car in there which is funny because there is a sign on the door saying 'NO PARKING'.