Goku is later joined by android 18, whose appearance reminds 17 of both his personal and Dr. Myuu’s true nature, contributing to the ends of both Myuu, who was killed by 17’s Shocking Death Ball, and Super 17 himself. Dr. Gero and fallen colleague Dr. Myuu brainwash Android 17 telepathically by way of Hell Fighter 17, a Machine Mutant model of himself created by the two scientists in Hell with the design of merging with him into the ultimate killing machine.
After attacking Trunks and before merging, 17 asks Android 18 to hitch him, a gesture which she mindlessly obeys until a fatal attack on Krillin brings 18 again to actuality, causing her to attack her brother. Seeing what she has done, he then targets Marron so he can achieve full management of 18, but 18 defends her from 17’s Photon Flash, leaving her in a crucial condition.
However a number of the cells (implied to be those of Kid Buu as his clones share the original’s persona) went out of control causing Android 21 to develop cravings to show people into meals to devour and absorb their energy like Cell and Majin Buu. This caused 21 to develop an evil break up personality which is vying for control of Android 21’s body.
sixteen states they deliberate to use the soul hyperlink system developed by Dr. Gero to suppress the evil 21. Android 21 recreated sixteen as a result of him being designed after her human son and would have lived peacefully with him had it not been for her cravings and growing evil persona.
Pan’s ploy to have Gero deliver 17 to a halt is ruined when Dr. Myuu reveals his programming positioned him in full management of the super android, and so Super 17 kills Dr. Gero, for the second time. Piccolo and Dende create a gateway between Hell and Earth, permitting Goku to flee and confront Super 17, before another Z Fighters may be killed.