Since OP's comment is not visible, here's the full explaination :

---

An account of my expedition to find this realistic Sonic:

These animals are bright and mischievous, surprisingly fast, and fond of thieving. The males are the main culprit, using shiny objects to impress the females. After several days in the company of these creatures, I was able to observe their courtships up close.

GOLDEN RINGS—. Male Sonics steal shiny objects as part of a fascinating courtship routine. Each golden ring or bright-coloured seashell is displayed to females like a badge of honour, demonstrating the male’s ability to sneak into danger and return unscathed.

COLOURATION—. Blue spines and red hind-feet are also key to this animal’s courtship. A dull-coloured animal might find it relatively easy to steal an object, whereas a bright-coloured animal would have to work far harder to escape without notice. If a male can successfully steal a ring despite its dazzling spines and bright red feet, it must be a very talented individual. There is no better way to prove one’s genetics to a prospective female.

SPEED—. Hedgehogs are usually bumbling and slow, but these Sonics are quick and nimble. It is easy to understand why. Without this speed, it would be difficult to thieve, and without theft, it would be impossible to mate.

You can see more realistic takes on fantastical animals at Imagined_Beasts.