Your are probably thinking of the Shadow Android from Shadow the Hedgehog
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Sonic the hedgehog is, as his name suggests, a hedgehog.
Olgilvie Maurice Hedgehog, but he hates that name so he nicked named himself "Sonic" the Hedgehog because its cool, and he is fast!
Well it is already a name for a hedgehog created by a gaming company but if you want to call your hedgehog something don't choose sonic because it doesn't actually suit hedgehogs, it is sarcastic because they are very slow and yours could never be as fast as THE sonic the hedgehog. It would be an insult to your poor hedgehog. Another opinion: Sonic would be a cute name for a hedgehog.
Queen Aleen/Bernadeth the Hedgehog (she prefers Bernie) There is two mothers for Sonic in different parts... There's Queen Aleena in Sonic Underground and there's Bernadette Hedgehog in the Sonic comics His Mothers Name is Queen Aleena Hedgehog.
Scourge The Hedgehog