Walkthrough:
It takes everything the Androids have to defeat Cell, but after they do, Android 21 can no longer resist the urge of feeding any longer. She looks to turn Cell into candy in order to consume him, but Android 16 quickly asks your soul to link to her. Your soul will try to do this very thing in hopes of calming her down once again, but the persona inside Android 21 deflects your soul right back into Android 18. It appears as though Android 21 will be eating Cell, but then Android 16 launches an attack at her, preventing her from doing so just yet. Upset by this, Android 21 sends a giant attack at Android 16, which he is only able to hold off for but a moment. As he does, he will ask you, Android 17 and Android 18 to protect Android 21's true heart, and then he will be destroyed by the blast.
Realizing what she had ultimately just done, Android 21 goes berserk. However, instead of transforming into another powered up form, her real self will separate from the evil persona living inside of her. The good Android 21 will pass out, while the evil Android 21 is now embodied in her own real form. The evil version of Android 21 has already absorbed the good Android 21's Power, making her practically useless. The evil Android 21 will then turn Cell into a donut and eat him, absorbing the Energy and turning a different color after powering up.
After she does this, the good Android 21 will vow to stop the evil side of her, but the evil version of herself will tell her that she will consume anyone who tries to cross her. The good Android 21 will try to attack the evil version, but her blast will do nothing to her. The evil Android 21 will then flee, saying she'll be back to stop them after taking care of another matter. Once she has left, your soul will then link with the good Android 21 so she can help fight with both Android 17 and Android 18.
Android 21 will immediately want to go after her evil persona, but Android 17 and Android 18 will advise otherwise since they aren't strong enough to yet defeat her. Instead, they decide they will have to go about things cautiously. Android 21 suggests following the persona for now, having a feeling she will heading to one of the Red Ribbon Labs. After this, you will have another group of Clone Battles that end in yet another Clone Boss Battle, ones that will send you straight into Chapter 7.
Playable Characters
Android 21 (Good)
None
Opponents
Clone Nappa
Clone Tine
Clone Piccolo
Clone Krillin
Clone Vegeta
Clone Gohan