I haven't included anything because it's not a convention, it's a normal grammar rule that my grammar reference book on-hand has in it. This article isn't to replace typical grammar sense.
- Setup is a noun, used as follows: "Gyarados has an easy setup against Scizor."
- Set up is a verb, used as follows: "Gyarados can easily set up against Scizor."
- Set-up is an adjective, used as follows: "A set-up Gyarados is dangerous."