Alvin from "Alvin and the Chipmunks" is not a chipmunk. This is proven by the name "Alvin and the Chipmunks", as you can see, Alvin is separated from the chipmunks, suggesting that Alvin is an entirely different species, making him an "imposter" amongst the others. Also, in "The Chipettes", Brittney has the strongest resemblance to Alvin, so why is it not called "Brittney and the Chipettes". So all that proves that Alvin is not a chipmunk. Not to mention that Alvin wears red, and I'm not sure about you, but that seems awfully sus to me. In the video game "Among us", the color red is was the birth of the obnoxious catchphrase, "red sus", being that the color red in the game is a stereotype that they are the imposter. While that might be unrelated, keep in mind that Alvin wears red too, and he is also the imposter amongst the other chipmunks. So this proves that Alvin is not a chipmunk, or anything like that. Alvin is just a sussy amogus imposter.
𝓜𝔂 𝓭𝓮𝓪𝓻𝓮𝓼𝓽 𝓫𝓻𝓸𝓽𝓱𝓮𝓻, 𝓽𝓸𝓭𝓪𝔂 𝓶𝓪𝓻𝓴𝓼 𝓽𝓱𝓮 8𝓽𝓱 𝔂𝓮𝓪𝓻 𝔀𝓮 𝓱𝓪𝓿𝓮 𝓱𝓪𝓭 𝔀𝓲𝓽𝓱𝓸𝓾𝓽 𝓿𝓪𝓻𝓲𝓮𝓽𝔂. 𝓦𝓮 𝓶𝓪𝔂 𝓷𝓸𝓽 𝓫𝓮 𝓪𝓫𝓵𝓮 𝓽𝓸 𝓮𝓷𝓭𝓾𝓻𝓮. 𝓟𝓵𝓮𝓪𝓼𝓮 𝓹𝓻𝓪𝔂 𝓯𝓸𝓻 𝓸𝓾𝓻 𝓼𝓪𝓵𝓿𝓪𝓽𝓲𝓸𝓷. .