In between the Frieza sagas and Android sagas comes the Garlic Jr. and Trunks sagas but they suck so bad I dont give a crap. Plus they are not REAL vital to the story. Now with the warning by Trunks of the Androids coming, the gangs trains to be prepared for them. When they do arrive Yamcha is drained of energy and so they go and fight on another island without people (suggestion of Goku). Then when Goku's heart virus acts up, Vegeta kills Android 19. Then Android 20 runs away. He tries to steal energy from Piccolo but Gohan saves him. Then Android 20 and Piccolo fight. When Android 20 realizes he will be defeated he runs away while Trunks reveals these are not the same Androids from the future. So when Dr.Gero/Android 20 gets to the lab he activates Androids 17 and 18. The 2 new Androids kill Android 20 and activate Android 16, a prototype. Then the Androids start trouble, mean while, the gang trains for the destruction of the Androids, Krillin falls in love with 18 and Cell emerges..........a jam packed saga
In this saga the main enemy is Cell. He is a biogenitically created android made by Dr.Gero. It starts out first when Cell hatches in his Imperfect state. He absorbs people to gain power. Then while this is goin on our heros are training in the Time Chamber. When Picollo fights Android 17 Cell finds them and absorbs 17. However 16 and 18 get away. Then when 18 is close to bein absorbed Vegeta almost beats Cell but allows him to absorb 18 becoming Perfect Cell. Vegeta is defeated and Trunks is eventually defeated. Then the Cell games begin. Goku is defeated but Gohan fights next. Gohan seems to be getting defeated but with the death of Android 16 he goes SSJ2. After a huge kamehameha fight Gohan is able to kill Cell ending any fighting for 7 years........until Buu.