Mowz is a Little Mouser from Mario Party 8. He is one of the two possible thieves who stole Holly Koopa's candy on Shy Guy's Perplex Express. He also owns a roulette wheel in King Boo's Haunted Hideaway.
Mowz can be seen walking around in any place of the express. If the player lands on a certain green space on top of the train, the conductor of the train will report to the player that Holly Koopa has been robbed a candy. He will then tell who is the main suspect. It's either Bandit or Mowz. The player then has to show the conductor the train compartment where Mowz (or Bandit) was last seen. If guessed correctly, Mowz will give back the candy and the conductor rewards the player with 20 coins. If guessed wrong, nothing happens.
In King Boo's Haunted Hideaway, he owns a roulette wheel. The player can spin it, getting Mowz to steal another player's star, coins, or candy.