Fast Mode Unlock In Your Una-gamer Style Shack
[Submitted by: Cheat Masters ]
If you have time to kill but do not feel like going through the motions of unlocking new modes, you can choose the Balance Mode Games -> Marble Drop Game and deliberately fail the first challenge by letting time run out.
Wii Fit rewards you 1 coin for each one minute of gameplay to unlock new game modes (win or lose). The Marble Drop game takes 30 seconds to fail, but the game rounds up your play time to the closest minute.
This is a reasonably fast way to waste time (and press the A button to continue) if you're looking to unlock modes without earnestly putting effort into it.

Ultimate Balance Test
How to unlock: At the game’s main menu, you will see the balance board character. Point at him and click on him, and he will ask you to participate in the Ultimate Balance Test.

Challenges
Description: Unlock the various challenges below, achieve a 4 star rating on the challenge listed.

Jack Knife	Ten and Twenty Second Workout
Parallel Stretch	Thirty and Sixty Second Workout
Press-up	Six and Ten Reps Workout