Sonic is a series about a neon-colored anthropomorphic animal primarily about going fast. It began as a platforming series catered to "cool kids" with edgy commercials and a teenage target audience despite Sonic's design being ostensibly chibi and nonthreatening (when you remove the quills that come with any hedgehog character). The primary gameplay loop centered around redoing levels over and over and over again to clear them as effectively and as quickly as possible, with actual platforming skill playing second fiddle to memorizing level layouts and enemy placement.
Later down the line, in the (very) late 90s and early 2000s, Sonic shifted to be even edgier. He was given a redesign that made him look older, his games' plots shifted from "evil fat scientist does terrible things to childlike forest animals" to "edgy clone of Sonic somehow impersonates him to take down the US military while also finding out that the evil fat scientist he was made by (who is the grandfather of the current evil fat scientist who blew up the moon) betrayed his granddaughter whom Sonic's evil clone really loved (this is me leaving out sideplots that include a robot wanting liberation from the scientist's robot army and something about a bat with tits)".
His primary friend group was lobotomized into unconditionally loving him (save for maybe a single token edgelord who's barely edgy anymore), the games' voice acting made sure they never shut up, and all of these new factoids were delivered in the form of terribly-animated, terribly-acted cutscenes (that were bad even for the time) constantly interrupting gameplay while expecting you to take all this stupid shit 100% seriously.
If that first paragraph alone didn't already convince you that this series was accidentally tailor-made for the most autistic, degenerate specimens of the human species ever conceived, I could go into his extended history instead. How, after the series became a laughingstock to anyone who knew the slightest thing about gaming, Sonic's fanbase took to heavily modding their games or making fanfiction/fangames to express their frustrations. How, even after over a decade of unabashed travesties like 06, 4, or Forces, the series has only continued to spiral due to being handled by quite possibly the most retarded company in gaming (and its most retarded divisions, at that). Or how, the one time they got it right and struck gold with a game that literally every single person I've ever spoken to or heard from has recognized as quality (even if it wasn't made for them), their immediate next course of action was to completely ignore the developers for 6 years before going back to shitting out horrible trash that even the fans can't stomach without getting weird looks.
Sonic was completely fucked from the premise alone, but the insane lack of quality in its execution combined with the car-crash-tier history behind it easily crowns it gaming's most legendary autism machine Pokémon at least has the excuse of attracting autists on accident- it's so ridiculously mainstream that it's no wonder some weirdos got caught up in its broad reach- whereas Sonic only appealed to autists from the very start.
