Thats not the only way like 1 of my friends got it fighting a different lvl person i did but i got how to get cell jr myself and the same with saibamen(no cheats)
Peter (when he's hungover): This sucks worse than that time I went to that museum. (Flashback to childhood, standing in front of dinosaur skeletons.)
Peter (as a child): Why did all the dinosaurs die?
Man at Museum: Because you touch yourself at night.