There aren't any fairy's in any of the Sims games.
you cant
You can't, there is no such thing as a vampire fairy in the game.
You can't, there are no fairies in the Sims 2. Sims 3, however, introduces them in the Supernatural Expansion Pack
No
You can't really be a mermaid or fairy on Sims 2. But go on modthesims2.com or go to a downloading place for sims 2 and there should be a mermaid or fairy COSTUME. Download that and go to one of the stores in the town. The costume should be there and so buy it. Then go to your dresser at home and put it on.
You can't become a fairy as there none in the game, the best you can do is dress your Sim up as one.
In The Sims 2, fairies are not a default creature type like in later Sims games. However, you can create a fairy-like Sim by using custom content like wings, magic-themed clothing, and hairstyles that give off a mystical or ethereal vibe. You can also use cheats or mods to give your Sim magical abilities or whimsical traits to enhance their fairy-like characteristics.
you cant but there are clothing items on the sims 3 store for fairy wings
Have them play with the fairy toy box. Every now and then, it will produce fairy dust in a little bag.
Yes. There is a 50/50 chance of werewolf child or fairy child.
you have to play with the fairy box or is it called play box? Anyway you can buy, and if you keep using it a fairy will come out and will give you fairy dust.
Unfortunately, you cannot morph two kinds of Supernatural Sims. You can try Trying for Baby with a witch and a fairy, but i am almost positive it is impossible.