You can? I don't think you can. You can on pc, but you have to go on a site and download the outfit or whatever. Ekk, that gives me twiches. >_<
You can't, there is no such thing as a mermaid potion. If you want to become a mermaid on the Sims the only way to do so is by downloading a pre-made mermaid Sim.
They can only have mermaid costumes. They don't look that real you can see their feet. If you want your Sim to be a mermaid, buy the Sims 2 of download a mermaid Sim from the Internet.
In the Sims 3 Island Paradise your sims can become a mermaid. In order to become a mermaid, a mermaid must give you the mermaid kelp or in life time rewards you can purchase it. Your sim must be human to become a mermaid (not a vampire, wolf, etc.)
You can't on sims 2 pets gamecube. Only pc.
You cannot be a mermaid on the Sims 3. :)
if you starve it.
Usually when your sim is pregnant it will show in a few days on the Sims. Getting pregnant in the Sims is very hard just because you WooHooed does not mean you will get pregnant. Hope this helps!
u cant
To become a mermaid, your sims need to eat mermadic kelp, which you can get in two ways. 1) Your sim needs to be good friends with a mermaid and then use the 'Ask About Fish Parts' interactions while having your sim underwater with your sim's mermaid friend. If the interaction is successful, the mermaid will give your sim mermadic kelp, which you can then eat. 2) Your sim can also buy the 'Mermadic Kelp' lifetime reward for 25000 lifetime happiness points. After that, mermadic kelp will appear on your sim's inventory.
There is no The Sims 2 game available for the GameCube. And as for "winning", there is none. No Sim games from Maxis have ever had an ending; you play until you become bored.
On the gamecube it is really the same as other sims games. You have to have a really good relationship with the other sim. Try to make sure they feel the same way they do as you do them. Well you get into the bed then you cuddle, next you try to chose woohoo. If it isn't there that means you need to make your relationship better.
The only way to "make" a mermaid is to download the appropriate outfit items and have your Sim wear them. You can not turn your Sims into mermaids.