Retailer Amazon.com this week discounted pre-orders for Nintendo Co.'s Punch-Out!! for the Wii home video game hardware.

This week, Punch-Out!! held a pre-order price of $46.99, six percent off the MSRP.

Punch-Out!! is the latest version of the classic boxing title. It is expected to utilize the motion-sensitive controls found in the Wii Remote and Nunchuk peripherals.

The title carries a release date of May 18.

Nintendo in Feb. announced a new wave of titles to be released in the spring, including Excitebots: Trick Racing, Donkey Kong Jungle Beat, Punch-Out!!, Rhythm Heaven.

In Mar. it said the Wii has shipped 50 million Wii units to worldwide retail.

Last month, it announced the Nintendo DSi, an updated version of the handheld.

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