Sleeping Menu Mii:
     When  you  are  at  the  Game menu, remain idle (do not press any
buttons  on  Wiimote)  for a few seconds and your Mii will fall asleep
and  you will hear a new music. If you leave it alone for longer, your
Mii will wake up and the music will change back to the original.

Alternate paddle for Laser Hockey:
Press A + B buttons together before the game timer begins.

Platinum medals:
     Complete the following tasks to earn the indicated platinum medal.

Table Tennis:      Return the ball more than 200 times without missing. 
Shooting Range:    Reach more than 600 points.
Pose Mii:          Reach more than 1,000 points.
Laser Hockey:      Get at least 16 goals and win the match.
Fishing:           Reach more than 2,500 points.
Find Mii:          Reach stage 100.
Charge:            Accumulate 325 score points.
Billiards:         Accumulate at least 63 points.

Double shots in Shooting Range:
     Press  a  button  on  a 2nd Wiimote while playing a single player
game  to get a two sets of crosshairs. If you are fast enough, you can
double the shots.