Mario Party

Unlock New Stages:
Get 1000 coins and you can buy the key to the extra stage Bowser's Magma Mountain in the shop.
Get 100 stars and you open up the Eternal Star stage.

New Title Screen:
After you finish a game with a character, that character will be the star on the title screen

Easy coin collection:
Pick 3 characters and play until right before the final round then stop play and turn the characters into player 2, 3 and 4. Now you're all alone for the coins?

New items:
After finishing the Eternal Star Stage you can buy new items in the shops:
Plus Block (200)- Get a random number of coins.
Minus Block (100)- Lose a random number of coins.
Speed Block (200)- Numbers 8 to 10 appear on the block only.
Slow Block (100)- Numbers 1 to 3 appear on the block only.
Warp Block (200)- Players change positions on the board.
Event Block (200)- Boo, Koopa, or Bowser will appear.
Mecha Fly Guy (100)- Counts rotations of the control stick.
Record (50)- This lets you listen to the game's tunes in the Option House.
Talking Parrot (50)- Enables a voice test in the Option House.
Lucky Box (100)- Get 10 percent interest on coins.
Casino Box (300)- Bet your coins and get double or half.

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.