TO EVERYONE WHO CALLED ME OUT ON THE WHOLE SONIC UNDERGROUND ISSUE:
I'm well aware of the fact that Manic and Sonia from "Sonic Underground" are Sonic's siblings.
If anything, the whole "they're his kids" thing was technically a "head canon" of mine back in the day. Where (in an alternate universe or whatever) Manic and Sonia were Sonic's children (with Amy).
I'm not an idiot like many people assumed because of this. I've watched and researched Sonic Underground and came up with this "head canon".
So please, if you see an old artwork of mine depicting Manic and Sonia as Sonic's CHILDREN, please remember that that idea was a weird "HEAD CANON" of MINE. NOT LEGIT CANON.