Iconic characters from the Star Wars episodes I-VI movies can be unlocked by collecting Carbonite Bricks, these characters include Ben Kenobi and bounty hunter Boba Fett. To make a character playable when you have found a Carbonite Brick it needs to be thawed out on a left-side Decarboniser/Carbonite Station inside the Rebel Base on D'Qar. The video below shows you all 35 classic characters that are unlocked from carbonite bricks.