Here is a possible summary:
The episode is a parody of Dragon Ball Z, where Cell, a powerful android, announces his plan to destroy the Earth unless someone can defeat him in a tournament. The other characters react to his challenge and prepare for the upcoming fight. Meanwhile, Android 16, another android who wants to kill Goku, is repaired by Dr. Briefs. The episode ends with a teaser of Mr. Satan, a pro wrestler, joining the fray. The summary is interspersed with jokes and references to pop culture and the original show.
1. Gohan is having a nightmare.
2. Cell appears in Gohan's nightmare and kills Piccolo and Chi-Chi.
3. Cell then takes on Goku's face and says "I... love... you... son".
4. Gohan wakes up and tells Goku about the nightmare.
5. Goku reveals he's been having the same nightmare for a week.
6. Piccolo informs the group that Cell has gone missing.
7. Bulma asks if Trunks won, but Tenshinhan reveals Trunks didn't kill Cell, he just left.
8. Android 16 expresses his desire for more friends.
9. Krillin befriends Android 16 and agrees to help him get repaired.
10. Dr. Briefs agrees to repair Android 16, but discovers that he's missing an extensive portion of data.
11. Android 16 decides to live with his faults and not seek additional data.
12. Trunks tells the group that he'll stay behind and watch for Cell.
13. Cell appears on TV and announces the Cell Games, a tournament where he'll fight all comers.
14. Cell reveals that if he's not defeated, he'll blow up the planet.
15. The Cell Games will take place in one week at 28KS.5.
16. Cell tells the audience to prepare for their demise.
17. The episode ends with a cliffhanger as Cell's announcement is met with shock and concern from the group.