Darth Elmo's Lightsaber was used by Darth Elmo during his missions. He ran into Darth Bieber, took his lightsaber, and put a banana in there instead of the red crystal.
He used the lightsaber with the banana in it with his duel with Darth Kesha and defeated her.
8 Years Later, he ate the banana in the lightsaber and threw up on Darth Stick Man.
He gave the blade with no crystal in it to Darth Plagueis and joined him.]When Darth Elmo was near death, he lost the lightsaber which madehim cry for Darth Vader and ignored him but Palpatine actually took it and ate it.