Posted by MarioWiki
Whoever loses is pulled into the Piranha Plant's mouth, and is eaten. If the solo player wins, he/she walks up, looks in, and then laughs.
The first bit kind of sounds like Mario Party DS's first boss battle, but as far as I remember in MPDS no-one looks inside of Pirhana's mouth
EDIT: I'm trying to cut down on edits, but WOW! Someone was viewing this page from their WII!!