From Nintendo Wii Fanboy:
"During its first four days on sale in the US, Zack & Wiki: Quest for Barbaros' Treasure sold approximately 30,000 copies. A week later, it had added 15,000 to that total. Hardly breakthrough figures in a nation with over 3.7 million Wiis in bedrooms and living rooms...There's no doubt about it: Capcom's splendid piratey adventure has, as much as it saddens us, flopped...Super Mario Galaxy, another hardcore favorite, was released in Japan last week, and immediately leapt to the top of the charts, selling 251,000 copies in its first full week of sale. That makes it far more successful than poor old Zack and Wiki, but let's not forget that the casual gamer-friendly Mario Party 8 had even greater first week sales (265,000). In such a scenario, the message being sent to publishers is loud and clear: more party, less epic..."