Wii Fit

Successfully complete the indicated task to unlock the corresponding activity:

Balance Bubble: Successfully complete Balance Bubble on the Beginner setting.
Free Jogging: Successfully complete the Island Lap several times.
Free Step: Play Step Plus Aerobics several times.
Snowboarding Slalom: Accumulate two hours of total game time.
Step Plus Aerobics: Play Step Aerobics several times.
Tightrope Advanced: Successfully complete Normal Tightrope.
Tightrope Super Advanced: Successfully complete Advanced Tightrope.

When jogging, occasionally a dog will run past you and your trainer. Quickly sprint past the trainer and you will follow the dog instead, taking you on a different route around the island.

At the statistics screen (The screen after you choose your mii), there is the balance board character running on a treadmill in the background. Click him with your pointer and you will be asked if you would like to participate in the ultimate balance test

Get a 4 star on both reps in Press up and side stand , the Jackknife and parallel stretch to gain the challenge mode for this workout( note: to gain the 2nd workout/ reps you need to do well in the first one so that the trainer tells you that you are doing well and should go for more reps/ seconds.)

Earn enough 'Fitcash' by playing the various balance games and your Fitpiggy will do a little dance and change colour!

As a General rule to unlock new features
play the previous games or complete the highest amount of reps
or do more Body tests.