not once, not twice, but three times on the Wii.
Game Party Champions has three modes. Quick Play is for just hopping in, Story Mode is to "prove they're worthy of the 'World Champion' title" and, as the press release states, Party Mode has players taking turns with the WiiPad, while others use Wiimotes and "grief (wreak havoc) on their game." Is that what grief* means in the parlance of the gaming subculture, as defined by Prof. Horatio Newbs of Urbania University? We have learned something today.
*Urban Dictionary, multiple authors, UrbanDictionary.com (Internet, Internetia, Urban Dictionary Press, 2012) p.231