Board Thread:Event Help/@comment-32736030-20170731180629/@comment-33728484-20170731182728

If you don't have any more Bulma and Turtle medals, you'll have to rely on other free STR cards, such as Hyper Meta-Rilldo (he lowers the enemy's ATK), Great Saiyaman (he greatly lowers the enemy's ATK), Buuhan, and LR Frieza in his base form. Definitely choose Grandpa Gohan as your Leader, though. And I'd also bring Cyborg Tao, since he can stun the enemy.

Here's the complete list of free units you can use.