Promos are special Pokemon released through promotions, or promos. They can be received by reaching a certain streak,or number of continuous daily logins. They are gender-locked as gender-less Pokemon.
ShinyOnix: $0 Streak: 1 day
ShinyMagikarp: $0 Streak: 5 days
ShinyPikachu: $0 Streak: 7 days
ShinyHo-oh: $0 Streak: 14 days