Android 21 Arc Special Events
1. Goku & Android 21 (Good)
2. Piccolo & Android 21 (Good)
3. Android 18 VS Clone Cell.
6. Majin Buu & Android 21 (Good)
9. Android 18 VS Clone Vegeta.
10. Android 16 & Android 18.
11. Android 18 & Android 21 (Good) VS Clone Frieza.
12. Android 16 VS Clone Goku.