Growing up I had a massive thing for Sonic things: Nazo Unleashed, Super Mario Bros Z, sprite animations, etc

But there's one that stands out in my memory crystal clear, yet I can't find it to revisit after all these years to see if it still holds up like it does in my memory. Sonic was a prince (did not have his super speed) of this kingdom of Hedgehogs alongside his brother, who was jealous of how carefree Sonic could be. Believe he was cyan/light blue colored, and had a thing for Amy but she only had eyes for Sonic. I also distinctly remember Sonic ending up with a kindhearted Doctor Ivo (later Eggman) who is corrupted by experimenting on one of the chaos emeralds I believe. In the explosion, he's turned evil and Sonic also gains his speed. Eggman then launches an invasion of the hedgehog kingdom at some point, with Amy ending up presumed dead (though is rescued and pulled in some sort of out of time or dimensional pocket?)

Honestly saying all this out loud makes it sound really stupid, but I remember it being as high quality as Super Mario Bros Z if not more so. If anyone else remembers this lost piece of my childhood, the name or even finds it, I would be eternally grateful!!

I distinctly remember watching it on Newgrounds, but after a few hours of scrolling I just can't seem to find it anywhere. Thanks all for listening to my inane ramblings.