Pause game play, select the "Extras" option, then chose "Enter Code". Enter one of the following codes to activate the corresponding cheat function.
Play "The Battle of Azanulbizar", which is the second part of "Azog the Defiler", in Free Play mode. Progress until a troll drags in the second tower. Defeat the troll, however do not break the broken section on the tower. An endless amount of enemies will spawn, allowing time to get the required number of Buddy-Up attacks.
Play "The Battle of Azanulbizar", which is the second part of "Azog the Defiler", in Free Play mode. Progress until a troll drags in the second tower. Defeat the troll, however do not break the broken section on the tower. An endless amount of enemies will spawn, allowing lots of time to use every dwarf in a Buddy-Up attack. Note: The easiest way to complete this is to use a static player as player two while rotating the dwarves as player one. Consider setting regular Thorin as player two, since his name is last in alphabetical order. Then rotate in Bifur, Bofur, Bombur, Dori, Dwalin, Fili, Kili, Gloin, Nori, Oin, and Ori (all regular/current age) as player one. Each dwarf is conveniently next to each other at the "Character Select" menu. End by using Thorin (Lake-town) with the regular Thorin to complete the task. Note: Make sure you get a complete kill with each combo before moving onto the next character. It also helps having the Invincibility red brick active, to avoid getting killed while rotating characters.
Mithril Treasure Items can be crafted at the Blacksmith in Bree. When forging any item there, two rings will appear, one inside the other. There will be with letters or controller buttons floating toward the center which you must press as they enter the rings. In order to make a Perfect Mithril Treasure Item, you must push each button or key as it floats over or within the inner ring. Do not worry if you make a mistake. Once you create a Mithril Treasure item, it will remain unlocked and can be reforged for free.
Shape a horse or a warg. This can be done in Beorn's house after completing the "Queer Lodgings" chapter. Inside is a barn. Select an animal and change its color.