Peppy Gals or Universe Survival Saga cards increase the chance of drops. The following characters have both of those categories and double the drop chance.
Time Attack Missions
PHY SSR Characters
Goku [Daily Training]
Sinister Plan Buu (Super) [Freaky Strategy]
[Beautiful Grasp] Goku Black (Super Saiyan Rosé)
To Greater Heights Super Saiyan God SS Vegeta
Inklings of Ultimate Power Super Saiyan 3 Goku (GT) (Golden Giant Ape)