The Lord of the Rings: The Two Towers Cheats

Enter a level with a forge, go to the forge and buy as many things as you can until you have below 30 gems. Exit the forge, then use all your SP and reenter the forge. Try to buy items and continue buying items until you hear a music sequence (it sounds like a "ringtone").

While playing as Legolas, hold down the B button until your bow charges. Then, while holding B, switch to overdraw and charge it by holding A. After overdraw is charged, release the B button, and then release the A button. You can now walk with a charged Overdraw.

In multiplayer mode, player A gives item(s) to player B. then player A quits WITHOUT saving. When the screen says the GBA lost connection, player B saves the game and quits. Player A will still have the item and player B will have the copied item.