The Party Host is a character that hosts a Mario Party game. Which character it is depends on whatever game is being played. The party host has many different jobs. They tell players what mode of game they are in, host the actual party, give out stars and tell beginners how to play. The party host of one game is rarely the host of another game. Some games even have multiple hosts (depending on what game mode is being played and what the board is).
List of Hosts