Imperfect Cell
Cell was created by Dr.Gero to kill goku, this is his first form he is the best creation of Dr. Gero and is very powerful because he can absorb people in this form he has absorb lots of people already and the z fighters are looking to stop him from absorbing all those people cell’s main purpose is to absorb android # 17 and 18.
Imperfect Cell 2
Cell’s second form which is also imperfect but one step closer to his perfect form in this form he has absorbed android # 17 and is now looking for # 18. He got stronger than before and could not be stopped by piccolo or other z fighters goku, gohan, vegeta and trunks are training in the hyperbolic time chamber until then Tien tries to stop cell from absorbing # 18.
Perfect Cell
Cell’s perfect form, he reached this form by tricking vegeta into letting him absorb # 18 and cell has finally absorb # 18 and is now perfect cell he could not be stopped by goku or any of the z fighters but cell gives them there last chance, there last chance is to compete in the world martial arts tournament and bring there toughest fighters cell gives them 10 days time for training after 10 days the world martial arts finally begins and he is defeated by gohan when he turns super saiyan 2.