To unlock a Grayed-out character, beat a game of Tamagotchi: Party On! To unlock the final three characters, get a gold medal in all Mini-games and Gotchi Games.
Let the computer roll:
Do not press A to skip the CPU’s roll. If you do, instead of relying on the die’s bounces to choose the amount of spaces they move, it will be a random number and could result in giving the CPU more spaces to move than they would have had before.