Unless they tell you themselves, there is no way to know.
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To get a multiverse code, you have to buy the multiverse card fro the stroe on poptropica, it's 350 poptropican credits.
You can enter someone else's Multiverse room by invitation, at no cost to you. You can get multiverse with no credits if you are a Poptropica member. Paid monthly members can use anything in the store without spending credits. But they cannot keep the items used if they stop their membership.
A friend or relative can provide you with an invitation to a Multiverse room. There is no other way to access the rooms. To create your own room requires a purchase with Poptropica credits. (You cannot include these codes anywhere on WikiAnswers.)
The Multiverse is a private game room that you can set up on Poptropica. ... Once you get there, there will a save button for you to push when you want to save.
WikiAnswers cannot be used to distribute Multiverse room codes.
if you look at the right corner of the screen it will be there.
you need to have the multiverse card when you do you make a room and then you tell your friends to type in the code. you will then meet them in the room that you made......the multiverse card costs 250 credits
you use the mouse and click
there are exit doors
you can't unless someone else goes on it with you at the same time! but here is one multiverse I have code ajp84
Multiverse is now free. Just open it and share the code. (You can have a multiverse but not a physical room or house.)