A Small Selection of Wii Cheats

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Change bowling ball colour

As The screen is fading to black for bowling, hold down the control pad until it fades to bowling for these colours:
Cheat Effect
Control Pad Up Blue Ball
Control Pad Right Gold Ball
Control Pad Left Red Ball
Control Pad Down Green Ball

 

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Change the tennis court

To change the tennis court to the blue practice court, press and hold (2) at the warning screen that shows after selecting characters.

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Play Golf without maps or meters

To disable the power meter, map, and the wind speed indicator, press and hold (2), then make a selection at the "Select a Course" screen.

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Change the tennis court

To change the tennis court to the blue practice court, press and hold (2) at the warning screen that shows after selecting characters.

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Silver Boxing Gloves

After you've beaten the Grand Champion, Matt, in a boxing match you'll be able to wear silver boxing gloves. To do so, hold (1) when the screen becomes black before a boxing match.
 

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"Splitter"
Obviously one of the most tough to hit pitches in Wii Baseball. The ball will sink down at the last second. Mostly causing a strikeout.

To throw this pitch, hold A and B down and flick the Wii remote. [Slow or fast, depending on the speed you want.]

This pitch will give you an advantage in Wii baseball. Goodluck!

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Special Bowling Ball

Get to pro level to unlock a bowling ball with diamond designs on it.
Wii Sports Easter Eggs

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Scare Crowd in Bowling

To scare the crowd while bowling, start the regular motion for bowling and let go on the backswing. The ball will fly backwards and the crowd will scream and jump.
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Amuse Crowd in Bowling

To make the crowd laugh in bowling, move to either of the gutters in your lane, turn into opposite lane, and bowl so the ball goes over the barier between the lanes. The ball will go into the gutter in the opposite lane and the crowd will laugh.

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Golf:
Tips-
It really is a good idea to practice your shot before actually shooting because it could easily be too hard or not hard enough.
Try not to hit over the bar because it curves the ball really badly and can get you out of bounds easily.
Pay attention to the wind!
Be very careful when putting.
Codes-
None.

 

Courtesy: gamespot.com/wii/sports/wiisports/hints.html | cheatscodesguides.com/wii-cheats/wii-sports/ | news.softpedia.com/news/Wii-Sports-Cheats-and-Unlockables-Wii-46781.shtml | neoseeker.com/Games/cheats/Wii/wii_sports.html