And they are...
- In tennis, hold the 1 & 2 buttons during the warning screen right until the positions screen loads up for a blue court (the one from training).
- Press 2 while pitching in Wii Sports Baseball and you'll pitch under-armed.
- On hole 3 of Golf, there is a small section of fairway at about a 45 degree angle to the left from the tee box. It is a small patch surrounded by Out Of Bound-ness. If you can land your ball on there, you can easily make it on the green in 2, to to Eagle the hole.
- In boxing, Beat the Champion, Matt, and press and hold 1 when the screen is black before a match to use the Silver Boxing Gloves.
- In bowling, go into training and select Power Throws. Then before you start, push A and move two clicks to the side, and then push A again and move all the way to the right. Then when you bowl the ball make sure that you release it high so that it goes onto the ledge - see the video for results!
Remember to check back again tomorrow for the next Nintendo tip!