To understand that you have to know the stroy of the young Sonic(the hedgehog).He ran so fast that his fur turned blue with the heat and fixed itself into the spiky style he has today.
I thought Sonic was running too fast and it caused the machine to explode, and it was the power of the emeralds that changed him blue. Needless to say, I'm probably wrong.

Tonic, I'm sorry for not remembering Sonic lore, I stopped getting STC last year, or maybe it was it the year before. I can't remember.

Now,back to retirement
You're in retirement? I hadn't actually noticed.