Mlp infection - bugfestation

(might be getting too into infection aus i can't tell if this one is for fun or a cry for help. Also i habe no idea what story cards to shove into so good luck) Flim and Flam being the "entrepreneurs" they are decided to make and sell "Changeling Repellant" as a product with some very shady ingredients they bought from an even shadier character. I think you can see where this is going.