LEGO The Lord of the Rings Vita Cheats and Tips

Get true adventurer on every level

I *think* you first have to unlock/find the red brick that contains the ability you want to use the cheat code for, and then the code will give you the ability for free (instead of having to pay for it). Haven't tried this yet, but I'm assuming that's how it works!

OK, to defeat him you have to be in Legolas. Once you have gone through the hobbit holes as a hobbit or as a dwarf and have gone up, you find a block with rope on it. You have to activate it and then the troll will come over. Run backwards as he hits the block, and then his weapon will get stuck. As Legolas tightrope over the rope and jump onto his head, firing an arrow into his noggin. Do the same on the other side. One of the sides Gimli has to destroy something to get the troll to come over.
Good luck!

Read this walkthrough and it will explain what you need to do.

When the Cave troll, first enters it breaks a post and the stones fall to the ground in a pile, build them up to make a platform, you mat need to run away from the platform so the troll follows you and you have time to build it and jump on top before it breaks it. Use Legolas and double jump over to the ledge and build up the fallen post with the grey blocks and the cave troll will swing he chain at you and get it caught around the post. Jump on the chain and walk to wards the trolls head and it will automatically soot arrows in it's head and break the post. Switch to Gimli and build up the grey stone to make stairs and walk up onto the ledge. Walk left and jump on the platform and jump and hit the attack button to break the slab (you will need Balin's axe which you can find behind a spider web when you first enter the tomb) and go through the crawl space when you emerge, head left and break the slab at the end and the build up the second post with the rubble left fro the slab. Stand behind it and hold the attack button to do a charge attack on the post, it will fall on the trolls head and killing the troll!
Hope this help!