Ratchet & Clank: Size Matters (PSP)

Acid bubbles
Wear wildburst armor.

Bonus skins
Collect the indicated number of Titanium Bolts to unlock the corresponding skin(s) under the "Specials" option in the pause menu:

Plundering Pirate Captain skin: 6
Ratchetzilla skin: 6
Troical Vacation skin: 4
Play ten online matches without dying to unlock the Dan skin. Note: The matches do not need to be done in a row.

Crystal shield
Wear ice 2 armor.

Death By Bull
Use the Armoogedon for this trick. Go to any island and change a monster into a bull. Just after you change him into a bull, jump on his back and stay like that. If the bull moves you also have to move. After about seven seconds Ratchet will start screaming as if he fell of something high and die. You will have to start at the last checkpoint.

Defeating Otto Destruct
To defeat Otto (the final Boss), you need four weapons: The Optical Maser Array, Electro Rocket (with shock and Lock-on mods), Shield Barrier and the PDA. Put up a shield and use the Optical Maser Array to lower his shield. Then, blast him with the Electro Rocket. Keep repeating this until you defeat him. Use the PDA if you run out of ammo. This is when you and Otto are the same size, not for the Battle Ratchets, Giant Otto or the Giant Clank Battle.

Easy Experience
Use the following trick for easy weapon experience and bolts. After you get to the Clone Factory, Quodrona, go back to Technomite City, Challax. Go through the board with the weapon you want to level up. When you run out of ammo, buy it on the PDA. Afterwards, go to Farming Cooperative, Dayni Moon and do the same thing. Then, go to the Clone Factory, Quodrona and fight through there. However, do not fight Otto. Repeat this process as many times as desired, You will level up once at least each three planet course and get at least 50,000 bolts (500,000 bolts in Challenge mode).

Easy Wins
To complete the game without having a hard time killing enemies, train you weapons at the same rate. Have each of them on the same level so they are equally powerful. When one weapon runs out of ammunition, switch to another.

Flaming wrench
Wear wildfire armor.

Secrets and Special Items
Go to the Specials under the pause menu, then toggle them on or off.

Effect - Code

Plundering Pirate Captain Skin - 6 Titanium Bolts
Ratchetzilla Skin - 6 Titanium Bolts
Troical Vacation Skin - 4 Titanium Bolts

Shock Crystal Armour
The shock crystal armour is combined with the electroshock helmet and boots. and also the crystallix body armour and gloves. You must have the crystallix armour and the electroshock armour. It brings up giant crystals that are electric.

Throw fire-balls
Wear fire-bomb armor and strike three times on the third strike a fire-ball will shoot out.

Unlock Dan Skin
You can unlock the Dan skin for use on your online account. These matches do not need to be done in a row.

Effect - Code

Dan Skin - Play 10 online matches without dying

Unlock Fire-Bomb
Mega bomb helmet, torso, boots, Wild fire gloves.

Unlock Ice II
Crystallix helmet, Hyperborean torso, gloves, boots.

Unlock Shock Crystal
Electoshock helmet, boots, Crystalix torso, gloves.

Unlock Stalker
Wild fire helmet, Chameleon torso, boots, Sludge Mk 9 gloves.

Unlock Triple wave
Wildfire helmet, Electroshock torso boots, Sludge Mk 9 gloves.

Unlock Wildburst
Sludge Mk. 9 helmet Wildfire torso, gloves, boots.

Unlockable Cheats
To unlock these Cheats for use in the game, you need to get skill points by doing various tasks throughout the game. Once you have enough, you will be able to turn on/off the Cheat whenever you want.

Effect - Code

Big Headed Clank - 03
Big Headed Enemies - 14
Big Headed Giant Clank - 01
Big Headed Ratchet - 05
Bolt Confusion - 20
Climb The Treehouse - 25
Hardcore Mode - 24
Mirrored Levels - 10
Mooo! - 24
More Cowbell - 08
Old Timey - 24
She's On Fire! - 07
Super Bloom - 12
Weapon Switching - 16