Dragon Ball Z

"The room of spirit and time. Cell has fused with android #17, becoming practically invicible-- but not for long! Training in the Room of Spirit and Time, where a year passes for every day outside, Vegeta and Trunks have gone beyond the Super Saiyan, reaching a level of power even greater than second-stage Cell! Now Cell is the one who is outmatched-- but Vegeta agrees to help Cell fuse with Android #18, the last element he needs to become 'perfect',...

"Gohan vs cell. The day of the Cell Game has come, the day when Earth's champions must compete to save the entire human race from destruction."--Cover.

"Years after the battle with Cell, the Earth has forgotten about the existence of the super warriors, and Gohan is living the life of a mild-mannered high school student."--Cover.

The Lord of Lords, the mightiest of the dieties has come to Earth seeking Goku, Gohan, and Vegeta's help in preventing the evil wizard Bobbidi from resurrecting the imprisoned djinn Boo. If they lose, their power will be fed to the djinn to make him even more powerful.

Boo breaks free from his mater Bobbidi and begins rampaging freely. Goku transforms into his strongest form ever and Trunks and Goten attempt to merge with one another in an attempt to fight back. However, the citizens of the world take matters into their own hands and summon their secret weapons, the seemingly invicible, but incompetent, Hercule.