As Robotnik left the murderous battle, his eggmobile -covered in the red paint of martyrs, was slowly making a wiring sound as it hovered, it was that silent, until a wail of a baby broke the silence like a baseball breaking a window. He thought nothing of it at first, until he saw the child, a bush wall away, a note underneath the cradle.
it reads "to whoever reads this, please look after our son, someone is going to kill us - we're outnumbered and outpowered, his name is sonic the hedgehog, born june 23rd 17:43, i left him here so he wouldn't be killed.".
Robotnik picked up the child using one the bots following behind him, he knew this child would be of some use to him.
One way or another...
