It has no particular password. It varies for each tamagotchi, since it's a tama-town password. You just need to find it out yourself on tamatown.com.
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To find a password you have to look in your instructions that are included in your tamagatchi PC pack.The secret code is below the picture that labels the tamagotchi.
you get their item password and on your password screen press A, it asks ITEM PASSWORD? and you enter the code
you get it when you donate enough money to him. --mewMew
on the instruction manual
the tamagotchi king looks like a golden egg with a crown and a cape
For karoke machine :07001 43498
I could if I had one, but I don't, and even if I did I wouldn't.
I know there is a code or password, but I don't know what it is. SORRY!
It is in the souvenirs, you cant use it.
On the teacher in the school building. :)
it is on the counter of the food court