Sonic is a hedgehog and the main protagonist of the Sonic the Hedgehog franchise.
Sonic debuted in the 1991 game Sonic the Hedgehog for the Sega Genesis. The main point was that you were supposed to stop Dr. Robotnik (Now known as Dr Eggman). He has become one of the most popular video game characters and is even getting a movie next month (as of writing this page).
Albert has featured on his channel multiple times in the past. In When BOYS play ROBLOX GIRLS ONLY GAME, Albert makes an account called 1231asd1 and makes him dress up as Sonic the Hedgehog. This video was also the debut of one of Escape from the City which is a meme on Flamingo. He has also played a Sonic roleplay game in the past on his channel where he makes his own character. In NEW ROBLOX AVATAR GETS ME BULLIED, Albert makes a Robloxian Highschool avatar to make him look like Sonic the Hedgehog which he calls "Sonic's brother thats a serial killer." In Albert became SONIC, he dresses up as Sonic the Hedgehog while playing a fan requested game, BEAR.