Cell is Dr. Gero�s strongest Android. He is very unique compared to the other Androids, in that he has the DNA of all of the strongest warriors on Earth, including Goku, Piccolo, Vegeta and Frieza. With their DNA in him, Cell can use any of their moves (his main being the KAMEHAMEHA). Cell can regenerate himself completely, unless his core is destroyed. After using a self-explosion (Goku teleported him from Earth and killed himself and King Kai), Cell comes back to the earth by regenerating from his core and comes back to fight the Z-Warriors, killing Trunks. While undergoing different transformations, Cell takes different shapes and forms. The forms range from Imperfect, Imperfect with Android 17 absorbed, Perfect with Androids 17 and 18 absorbed, and Ultimate Perfection when he completely regenerates himself after the self-explosion.