Who was the first evil Sonic?

Could you elaborate on the concept of an "evil Sonic"? Are you referring to a character from the Sonic the Hedgehog franchise that has been portrayed in a negative light or as an antagonist? If so, it's worth noting that the Sonic the Hedgehog series has had numerous iterations and spin-offs, so the answer to who the first "evil Sonic" might be could vary depending on the context and the specific media you're referring to. However, if we're considering the original Sonic the Hedgehog games and cartoons, there wasn't necessarily a character that was explicitly labeled as an "evil Sonic." Instead, the series typically featured Sonic as the protagonist, battling against various villains and antagonists, such as Dr. Robotnik (also known as Dr. Eggman) and his army of robots. If we broaden our definition of "evil Sonic" to include characters that were similar to Sonic but had darker motivations or abilities, then we might consider characters like Shadow the Hedgehog, who was introduced in the Sonic Adventure 2 game and was initially portrayed as a mysterious and potentially dangerous figure. However, it's worth noting that Shadow was not necessarily evil, and his motivations and alliances shifted throughout the series. In summary, the answer to who the first "evil Sonic" might be depends on the specific context and definition you're using. If you're looking for a character that was explicitly labeled as evil and resembled Sonic, then there may not be a clear answer within the original Sonic the Hedgehog franchise.