The Cruel Androids of the Future
Win: Defeat all enemies
Lose: Player HP depleted, Trunks HP depleted
Both of them are quite powered up and they are also hard to stagger. Android 18's evasive skill also showers Ki blasts around her so be careful. They also tend to double-team their targets, so if you find yourself getting pummeled by them, use an evasive skill to stop their attack.
Cell is Here?! Save Trunks!
Win: Defeat Cell
Lose: Player HP depleted, Trunks HP depleted
You'll be fighting a possessed Perfect Cell with Trunks. He's tough, has high HP, and you can't almost stagger him. Powerful Ki Blast Supers and Ultimates can take care of this. Also, combos may not be a good idea against him since he tends to use evasive blasts quite frequently. Combo only when you need to build up your Ki gauge for your special attacks.
Use meteor crash to seperate them & use chain combo's it will keep at least one of them busy. Square+Triangle+Square+Triangle+Square+Triangle will buy you time to charge up or help trunks as the combo will knock target to the ground giving you about 30 seconds of time