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After Sonic the Heghehog hit theaters on Febuary 14, 2020, on the same day, Paramount confirmed on Twitter that Sonic, along his pals, would get replaced with their movie designs because they "felt like their personality almost feels better than one of the games", it ended with them saying goodbye to Modern Sonic. And so, Sonic's "new" design was then used in Sonic games.
His personality is now from the movie, and his design was changed to look like the Heghechu. A rare hedghehog specie.
Sonic looks like the same from the movies, but now his ears are a bit taller, with the top being black, he has three brown strips on his body. and a Pikachu-like tail with the top being black.