On the second TIE Fighter Factory stage, the helmet of Delta Squad sergeant RC-1138, who first debuted in the game Star Wars: Republic Commando, can be found on an out-of-the-way ledge in the level.
Contributed by MehDeletingLater
In the Trophy Room on the level "Imperial Kashykk", you can find the monsters that Obi Wan, Anakin, and Padme fought in the arena in Episode 2 as well as Jar Jar Binks in frozen carbonite.
Contributed by gamemaster1991
The Apprentice's nickname is "Starkiller". This name originates from early drafts of the first film, where the protagonist was named Annikin Starkiller.
Contributed by DidYouKnowGaming
