Palpatine and Yoda could be dubbed with dialogue from the lightsaber duel between Saddam Hussein and Lloyd Bridges from Hot Shots Part Deux.
"Your powers are weak, old man, you should not have come."
"We'll settle this the old navy way: first guy to die, LOSES!"
Saddam may have lots of funny lines that could be used for Palpatine, though it's been a while since I've had a chance to see it.