Ratchet & Clank 2: Locked and Loaded Cheats

After completing the game, Challenge mode and a lot of other features are open to you.

Get skill points and visit Slim's.

If you want to check if you have completed the game, check this menu.

Whenever you need to boost just tap X repeatedly. Doing this will make your ship go alot faster and not deplete your bar!

Go to the Ship Shack and try to buy something you can't afford and when you get the "You Can't Afford It" message, hit X and quickly go an item right next to the one you that you can't afford and buy it. Instead of the item you bought, you will have the item you couldn't afford.

Go into First Person Mode, double jump towards a wall and then repeatedly press the square button and you will climb up the wall.

All you have to do is make sure you get the Decoy Glove from the vendor on the Desert Planet Barlow: Vukovar Canyon. YOU MUST HAVE THE DECOY GLOVE FOR THIS TO WORK, and I highly recommend making sure it has full ammo, too.When you have the Decoy Glove, go to the Megacorp Games and start the Impossible Challenge in the Battle Arena. Fight through the first 5 levels of the Impossible Challenge any way you want. I recommend using only one type of weapon to do it and the reason will become clear in a moment.After the first 5 levels a Cage Match will start. Jump up into the cage area and defeat all the enemies in first 4 levels of the Cage Match any way you want- once again, using one weapon is recommended.HERE COMES THE IMPORTANT PART:Now, during Round 10 (the last round before you fall back onto the floor after the Cage Match), defeat all but one or two of the enemies. Once you have done this, SWITCH TO THE DECOY GLOVE and throw one or two decoys out. The last one or two enemies you have left alive will go after the decoy(s). Defend the decoy(s) at all cost and kill any enemies left. If you do this successfully, you will leave a decoy inflated on the side of the cage where you just fought the Cage Match, and then you will fall back down to the platform below for round 11.Guess what? The enemies will COMPLETELY ignore you, and they will gather underneath the spot where the decoy was left in the cage during the Cage Match! You can now run around and smash all the ammo crates to refill any ammo you used, and then if you want you can use the wrench in first person mode to kill the enemies gathered under the decoy. This will work for rounds 11-15.Round 16 starts another Cage Match. Your Decoy will disappear. Defeat all the enemies for Rounds 16-19 any way you want, then defeat all but 1 or 2 during Round 20. Once again, leave a decoy or 2, defend the decoy(s) (make sure it stays there) and kill the last enemies alive again. You'll fall down to the platform for Round 21 and your decoy(s) will stay in the cage up above. Once again, the enemies will ignore you and gather under the decoy(s)!Repeat this technique for the rest of the Impossible Challenge and you will win easily every time with plenty of ammo and more than likely very little damage. THINGS TO REMEMBER:1. Be careful setting out your decoys during the levels where the lava rocks hurl from below. The rocks can and will destroy your decoys so you might want to kill the enemies... 

A glitch in the controls of the Snivelak car allows you to pass through walls:
First enter the car and collide head on with a wall,
Press and hold X L1 R1 and LAnalog (down), the front of the car points up and raises slightly, then moves into the wall and drops down (if not release X then hold it again)
Next release L1 and you pass through the other side of the wall.This gives access to a few sections of the museum that usually can't be reached one of these voids is behind the curved wall near the car.

Be at any Planet Where your Ratchet walking. Note: You must have the decoy gun before doing this. Stand in front of the wall you want you want to go through. Take out your decoy gun and then lay on as close as you could get one on each side of you with out making it fall through the floor. You have to be facing away from the wall when doing this. If done correctly the screen should be shaking. Now lay a decoy directly in front of you which should also be between the other two. What you just did was have the decoys force you through the wall.

On Planet Bolden: Silver City, ride the power lines to the construction site, but don't jump on the first steel beam. Instead make sure you're on the left power line and hit the transformer. As you hit the transformer, press jump, and execute a heliglide over to the left where the city is. Now make your way to the street and follow it to the end to find a lone building towards the South of the map(you pass underneath this when continuing with the power lines). Make your way either left or right around the building. At about half way, try to walk through the building and make your way to the center (you may have to jump through). Start to jump, and the immediately center the camera (Press L1 and R1 at the same time) because you'll have to take out a several Thugs. There will be two teleporters in the building, one that goes back to the ship, and one that goes to the Insomniac Museum. Take the one to the museum and enjoy!

This method of getting to the Insomniac Museum is one of two ways that Insomniac intended for people to find the museum. The first way is to beat the game with the appropriate level of completion. The second way is to be at the right place at the right time, as described below.

The right place is on the planet Boldan, in the courtyard near the big clock, on the top of the fountain. The right time is 3am by the PS2 clock which should also be 3am as shown on the big clock mentioned above.

So, into the specific details: I suggest you try this after you have unlocked the electric fence and cleared out the enemies in the two courtyards that are to the left once you pass the electric fence. You don't want to get shot while trying this! The fountain that you need to stand on is closest to the clock and it is the only fountain in the immediate vicinity. Don't confuse this with the pair of fountains in the opposite courtyard. To get there from your ship, go through the deactivated electric fence, up the walkway and turn left. Walk to the end, into the room that you opened with the switch that has two stairways leading up and out of it. Take the left stairway and the fountain will be straight ahead of you in the courtyard. There is no water running in the fountain; it is just a stack of what looks like bird fountains of decreasing size. Stand in the center of the transport pad in the top of the fountain when the clock nearby chimes 3 (at 3am) and a message will appear saying ''Press Triangle to go to museum'' or something similar. Press Triangle and you will transport to a hallway with some bad guys. This is the entrance to the museum.

There has been some controversy over how exactly to do this, people having various problems, etc. so I think more detail will be of use. Obviously if your PS2 clock is set right, go there at 3am, duh. I have verified that this works if you are in the center of the transport pad while the clock is chiming 3am. I do not claim that it works any other time outside of the few seconds while the clock is chiming. In fact I went back a few minutes past 3 and the transporter did not work at that time. I also do not claim that this is the only time that works. However, I have personally verified that this works when the PS2 clock is at 3am PST, and many others have corroborated this.

If you do not feel like waiting until 3am, do the following:

Reset PS2 clock to 2:55am and your time zone to PST. Now, load the game and get to the...