SUPER JUMP
If you jump on any enemy, the continue holding "B", yoshi will flutter three times as high.
DONT WASTE TIME OR EGGS
Just fluttering on some parts of levels that involve shooting eggs to move platforms, just fluttering continously can get you where you need to be quicker and without using eggs or waisting time.
HOPE THIS HELPS!

In the game you should try to get all the character coins,red coins,flowers and stars and you will unlock all sorts of things like minigames hard mode.

You can unlock Baby Peach-umbrella can fly with the wind, Baby Donkey Kong-can climb and use DK Smash, Wario-can move metal with a magnet and Bowser-Can breath fire (Lose tongue ability)
By defeating the game you can get secret levels and by getting all the character coins for each world you can get hidden levels!

Zelda_Fan