Throw the egg,shake the egg,or just leave the egg alone and it will hatch by itself.

I think u can throw it, shake it,leave it, or destroy it with Ur dash.

Depending on how the chao hatches, its facial expression changes--I hatched two by hurling
them at the wall and they both now have evil looking sharp tooth grins. I left two others
to hatch by themselves and one looked happy when it hatched, the other was normal.

Sonic and amy are cool and tails and nuckols and big and the robot