It will depend on what changes you want to make. You can manage your account through the My Account link. You will find this at the bottom of the Moshi Monsters website.
You can not change your Moshi Monsters username.
You can not change the color of the Volcano on Moshi Monsters.
You can not change your monster's name on Moshi Monsters.
You can not change your monster to a different one on Moshi Monsters.
You can not change your color on Moshi Monsters if you are a free Basic member. ONLY paid members can change their colors on Moshi Monsters.
A Moshi is what the monsters are called: "Moshi Monsters". You can not catch a Moshi Monster, you adopt a Moshi Monster when you start your Moshi Monsters account. Choose carefully as you can not change your Moshi Monster once you have verified the account.
Once you join Moshi Monsters and put a name in, you are unable to change it.
No, you will not lose your rooms if you change the style of your Moshi Monsters house.
Moshi Monsters only speak Moshi. There is no way to change their language.
You can not.
You can not.
you can't after you chose it or if you are just starting I think you can click the other button.