Zack & Wiki: Search for Barbaros' Treasure is really an unusual game, at least for a console, and I hope it becomes one of those unique titles that becomes an example of how to create a game that uses the Wii's controls in a very different, but oh so right way.
The story is that Zach and his little flying monkey buddy, Wiki, are new members of the Sea Rabbits pirate gang. While flying to their hideout one day, the two find themselves crashed and stranded on an island where they soon discover the golden skull of Barbaros, a pirate who knows where a legendary treasure ship is resting. Now Zach and Wiki will travel all over the map looking for the lost 18 pieces of Barbaros so that he can tell them exactly where the ship is. Though the pirate doesn't seem to be telling the duo everything because he seems to know Wiki, even though the little guy doesn't remember Barbaros at all.
Levels are fairly straightforward. Zach and Wiki appear in an area near a treasure chest containing either a piece of Barbaros or a map to a new location (these typically come from boss levels). Puzzles are solved by turning various creatures into items. Yes, you read correctly. If you are close enough to a living creature, you can ring Wiki (simply by shaking your Wii-mote) and transform it into some kind of tool. This is a really innovative aspect because it adds a whole new dimension to your standard adventure game since you won't necessarily have every item you need immediately available and some obstacles might only be gotten past by itemizing them.
Another twist to the Zack & Wiki: Search for Barbaros' Treasure's mechanics is that you can only carry one item at a time. If you need to pick up a Frog Bomb, but you currently have a Gripper in your hand, the gripper will drop and the Frog Bomb will show up in your hands/inventory. Much like the itemizing aspect, this adds another level to the problems you have to solve since it might require multiple trips across the board.