yes make stairs
stairs only exist on the PC version though
no.
No, you cannot have Sims 2 pets on Sims 3. You must have Sims 3 pets for Sims 3 or Sims 2 pets for Sims 2.
you cant get pets on sims 2, only on sims 2 pets
you can make a house with 2 floors in both sims 1 and sims 2.
no you can only get pets on sims 2 pets.
You can build 2 floors on Sims 1
No but you can in the sims 2 pets
You have to have the original the Sims 2 or Sims 2 Double Delux in order to even install the Sims 2 Pets. But since you can have cars on the Sims 2 you can have them on the Sims 2 Pets.
Sims 2 Pets
Any "The Sims" game on the PlayStation 2 platform does not allow you to make any other floors, just the ground floor.
your pets will not get sick on the sims 2 pets :)
buy the sims 2 pets expansion pack. Then there will be pets on the sims 2.