Tamagotchi Mix unlockable content (Mermaid palace)

Hey!!! Long time since i've been active on here but im soon to recieve my new sanrio edition of the tama m!x

I have heard that unlike the anniversary edition you will still need to connect to 3 different tama mix to unlock the mermaid palace but I was wondering can anyone tell me does it have to be different tama mix or can it be connected 3 times to tama mix stations in japan?

My dear friend has grabbed one for me and if I can find out if it would actually work she is willing to go and connect it for me before sending it to me in the post >_<

EDIT:

Also can you unlock this straight away? like when you have a baby or must she raise an adult for me before this is possible?

Has to be a Tama Mix, it wont connect with anything else. I've tried Tama ID L, and Tama P. I have 3 mixes now and I can unlock stuff by resetting one various times to connect. You can do it as soon as you can connect.