Yoshi's Egg (or Yoshi Egg) is an item that you can find in Question Blocks (A.K.A. ? Blocks) or Egg Blocks. If you have found a Yoshi Egg he will hatch into a Yoshi (Like if it's green it's a Green Yoshi if Red Egg it's a Red Yoshi) and you can ride Yoshi in the game after he has hatched. White yoshi can spit eggs that has items in them too. If you have got a Yoshi while you found another egg you will be rewarded an item for keeping that Yoshi safe.