Lord of the Rings: Return of the King Cheats

On the level in which you are ecaping the haunted Mountain Just as Aragorn says "Hurry, Everything collapses" instead of running double back just before the rocks come tumbling down you will find the cave is collapsing ahead of you. therefore you will not be crushed. (Note this takes many MANY tries)

Faramir:AAYY
Pippin:YXBDown
Merry:ADownDownA
Frodo:XBBA
That is all Cheat bird out.

On all these cheats you MUST pause and be holding the L and R buttons the whole time.
Aragorn:
Up, B, Y, A, Give Aragorn 1,000 Experience Points
Y, B, B, Y, Replenish Aragorn's Arrows
Up, B, Y, Down, Aqcuire four upgrades immediately, when leveled up high enough. Upgrades: Dark Deliverance, Shield Cleaver, Lightning Strike, and Swift Justice.
Legolas's Gimli's and Sam's cheats can be used more then once.
Legolas, Gimli, and Sam:
A, Y, Up, A, Give Legolas 1,000 experience.
X, X, Y, A, Give Gimli 1,000 EP
T, A, Down, A, Give Sam 1,000 EP
Gandalf:
X, Y, Up, Down, Give Gandalf 1,000 EP
Y, Up, B, A, Bring Gandalf to level 4
Unlock Frodo:
Y, X, X, X, Unlocks Frodo for use.
Y, Up, Down, X, Brings Frodo up to level 2
Secret Characters:
Frodo
Merry
Pippin
Faramir
You have to have beaten The Cracks of Doom to get, Merry, Pippin, and Faramir.

Play as Frodo:
Pause game play, then hold L + R and press Y, X(3). A sound will confirm correct code entry. Note: The game must be completed first before this code can be enabled.

Play as Merry:
Pause game play, then hold L + R and press A, X(2), A. A sound will confirm correct code entry. Note: The game must be completed first before this code can be enabled.

Play as Pippin:
Pause game play, then hold L + R and press Y, X, B, X. A sound will confirm correct code entry. Note: The game must be completed first before this code can be enabled.

Share experience co-operatively:
Pause game play, then hold L + R and press X, A(3). A sound will confirm correct code entry. All experience gained by you in co-operative mode will be shared with your partner.

Share health co-operatively:
Pause game play, then hold L + R and press Y, Up, A(2). A sound will confirm correct code entry. All health gained by you in co-operative mode will be shared with your partner.

Unlimited respawns in co-operative mode:
Pause game play, then hold L + R and press X, B, Up, X. A sound will confirm correct code entry.

All actor interviews:
Pause game play, then hold L + R and press A, B, A, Up. A sound will confirm correct code entry.

Get Gandalf, Sam, and either Aragorn, Legolas or Gimli to level 10

Pause game play, then hold L + R and press A, B, A, Up. A sound will confirm correct code entry.

Unlock 4-hit combo: Pause the game, hold L + R and tap A, X, Y, B.
Unlock 3-hit combo: Pause the game, hold L + R and tap Y, Y, Y, DOWN.
Gain 1000 XP: Pause the game, hold L + R and tap A, Y, UP, A.
All special abilities: Pause the game, hold L + R and tap Y, X, A, X.
Level 8 skills: Pause the game, hold L + R and tap B, UP, UP, DOWN.
Restore missiles: Pause the game, hold

Ok this is the toughest level in the game.  Use Legolas for his good bow
skills and speed.
  First kill 60 guys.  Then you will get a checkpoint.  You'll have to
kill an elephant while your up there.  Go to the side where it has a
catapult.  Shoot it with the catapult and then shoot it with arrows.  It
will explode then you will have to kill another elephant.  Go to the
other side and do the same thing.  Then it shows Merry and Aowen being
knocked down by the witch king.  Run to the other side of the mountain
and load up your arrows.  Let the arrow go after a while but not too
long or he'll fly away.  Then you'll have to kill another elephant and
then the witch king again.  Make sure the witch king doesn't kill Merry
and Aowen or you will fail the mission at the checkpoint again.  It will
keep on doing this until you die, Merry and Aowen die, or the witch king
dies