Use a short character to crawl through and push the box off the edge. From here, walk to the right and blast the right wall to reveal a vent.
Throw a thermal detonator at the silver paneling on the wall and walk inside for another Canister. From here, walk toward the screen and to the right, past the Imperial panel. Grapple up and walk forward for the Canister. Use a Bounty Hunter to blow up the silver objects to the right at the bottom of the stairs. Chase him and hit him a final time to end the level.
Drop down and hit him two more times to make him run off. Jump across and hit him again, and he’ll jump down to the floor. When you reach the top, jump off and hit the Emperor once to make him fly to the other side. Assemble them, then stand on the elevator and use the Force on the lights to raise it. Battle the Imperial Guards for a third time, then some pieces will drop down to your left. You only need to knock two more hearts off of him before he disappears again. Drop down and take them both out, then walk around the path until you see the Emperor again. He’ll disappear again, leaving two Imperial Guards waiting below. Watch which floor panels light up and follow the path to him, and battle him until he’s down to seven hearts. He’ll electrify the floor in front of you, so be careful where you step. Ride it up and walk along the path to find the Emperor again. When you’re done gathering studs, go to the lower left corner and have Darth Vader use the Force on the wall, then build both objects and Force them together to make a fan. Then, use the Force to the left to make a platform, and jump up for a Canister. The Power Brick – Score x10 will appear above the throne. Quickly have Darth Vader use the Force on the eight lights– four to the left of the Emperor’s throne, and four to the right. Two Imperial Guards will appear once he’s gone, so just use the jump-jump-attack combo to get rid of them and start on those collectibles. Switch to the other character and hit him, and he’ll run off. Once he’s down to four hearts, he’ll shock you so that you can’t move. But first, battle the Emperor for a while. You have Darth Vader on your side for this one, who counts for both a Sith and Imperial character, so you’ll be able to get all of those collectibles out of the way. The thing about this level is that the entire thing is one area, and you’ll be battling the Emperor the entire time. In this level you’ll need a Jedi, Sith, Imperial, Short Character, Protocol Droid, Astromech, and Bounty Hunter.