Boonanza!

Boonanza is a Duel mini-game in Mario Party 6. It's name is a portmanteau of "Boo" and "bonanza". The introduction shows the first player chasing a lone Pink Boo, and though it quickly gets away, many more Boos then pop out of the ground.

Gameplay
The point of this mini-game is to round up as many Pink Boos as the player can into their piece of land; whoever gets the most Boos into their corral wins.