Jedi Destiny | Story Mode - Episode VI LEGO Star Wars 2 Guide

This level is all about battling the Emperor, in which you control both Luke and Vader. Palpatine will try to attack you with his electrocution ability - when it happens and he blocks one of your characters, switch to the other one and slash the old timer. When you wound him a few times, he'll run away and two royal guards will enter. It's easiest to get rid of them using Vader's force-choke.

Go down the screen and left to build a fan. Use it to get to the higher level and go towards the Emperor. You must cross the electrocuted floor, avoiding the segments that are lit in a given moment. When you reach the other side, you'll be able to wound the Emperor some more.

When he runs away again, follow him. He'll jump to a higher platform. Build an elevator to the left and use the Force on the circles on the wall. Now just finish off Palpatine - he'll run away some more, but chasing him won't require solving any puzzles.