The Egg Throw first appeared in Super Mario World 2: Yoshi's Island. The player must hold the X button (R in the GBA remake) and then aim the egg to where he or she wants the egg to go.
In Yoshi's Story, the Egg Throw action is no different than the one in Super Mario World 2: Yoshi's Island, except for the player holds the Z button to aim the egg. An Egg Throw is needed to pop a Bubble Pop.
Yoshi's Island DS controls the exact same as the last two counterparts, but players must press the X button to start aiming.
It appears as his up special in all of his games he appear in. On air, it gives him an extra jump, but have to wait 2 seconds to recharge. On the ground, it's he same, but does not let Yoshi jumps.