What is a Stand anyway? In the JoJo series, Stands are basically super powers given a "physical form", except they are seldomly actually corporeal. Any living organism(including animals and plankton) can develop a Stand, but for the sake of balance. Only Stand Users start with one, everyone else might get a chance. Stands typically appear, as humanoids that hover by the user when summoned and idle, but they can only be seen by other Stand Users. To everyone else, it will look like you have super powers. There are always exceptions to the rule with Stands though. Some overall rules with Stands are this though
1. Stand protects its user, like a guardian. The name comes from "standing by" the user, sometimes using their powers without direct orders in order to protect the user, and by extension, themselves.
2. A person can only have one Stand, though that Stand can go through metamorphosis to evolve (Echoes, for example).
3. As a Stand is part of the user, damage is reflected between the two. In most circumstances, if the Stand's leg is sliced off, the user will lose their leg as well. Some Stands, such as the armor of Silver Chariot, are immune to this effect.
4.Stands can only be seen by Stand users. There are exceptions, but only with Stands that are bound to physical objects (for example, Strength and Yellow Temperance).
5.The further the Stand is from its user, the weaker the Stand becomes, with most only being capable of acting within three meters. Some exceptions are Hierophant Green and Highway Star.
6. Stands are usually bound to the user's body, but exceptions are abound, such as Wheel of Fortune being bound to a car, and The Fool being bound to sand.
7.As Stands are just images created by energy, the users are able to shrink them, mostly to enter the body of the opponent and attack its inside. Staying small, however, is very hard and takes a lot of energy.
For some examples and exceptions check out this page
for different types of standsFinally, stands are typically named after songs and bands, but feel free to name yours after Books, Movies, Games and whatever else you can thing of.