Bowser's Magma Mountain Stage:
Complete the first six stages and collect 1000 coins. You have to buy things in the shop, including the
key to the Magma Mountain, while playing in those six stages.

Eternal Star Stage:
While in the Magma Mountain stage get 100 stars. A special event will appear. The Eternal Star
stage will appear after that.

Special Shop Items:
Complete the Eternal Star stage. The ending sequence will appear. After that, special items can be
bought in the shops.

Alternate Title Screen:
To change the title screen complete the game with a character. Once completed that person will
appear as the main character on the title screen. 

Extra Songs:
To unlock extra songs on the Bowser's Magma Mountain and Eternal Star stages simply purchase
the record from the Mushroom shop.

Hint:
In Mario Party you need 50 stars, and Magma Moutain Appears in the shop, it costs 980 coins.
When you get 100 stars, bowser steals them. You kick his butt in the Eternal Start stage, you get
your stars back, you can now buy a no ghost, no bowser, or credits item in the shop. There are also
special items that appear after you complete mini game Island.