Wii Motion Plus is a surprisingly robust upgrade to the current Wii remote, I discovered yesterday while playing around with three of the mini games in upcoming title Wii Sport Resort.

When the game ships it will come with a single Wii Motion Plus add-on and a disc with ten or so games. They haven’t made the final decision on which and how many games will be in the final product, Nintendo’s David Young told me.

Wii Sport Resort, which will include single player and two player mini-games, will not work without the Wii Motion Plus, so those people who want to play the two-player games will have to buy an extra Wii Motion Plus add-on separately.

Nintendo had only three games on display at the show this week: Disc Dog, Power Cruising and Swordplay.