Miles "Tails" Prower. He is too obsessed with machines, his genius with them is comparable to Eggman's and, most important of all, he follows Sonic everywhere. Everybody knows that autistics love Sonic.
In fact, the obsession of people on the spectrum with Sonic is enough to qualify Eggman, Metal Sonic and Amy Rose as autistics, too. They are all obsessed with Sonic. 
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DISCLAIMER: It should be noted that, while I strongly suspect I have Asperger's syndrome, I am not diagnosed. Nevertheless, my score on RAADS-R is 186, which makes me a pretty RAAD guy.
Sorry for this terrible joke, by the way.