When the Wi-Fi router is plugged into the Game Central Station near the beginning of Ralph Breaks the Internet, this scene occurs:
RALPH: "Whiffey"? Or "Wifey"? Well, it’s either whiffleball or an arranged marriage game.
SONIC: It's actually pronounced "Wi-Fi", Ralph.
RALPH: Yeah, that's what I said.
SONIC: And Wi-Fi is the Internet, which is an online community where human beings go to shop and play games and socialize.
It is quickly made very clear that none of the other video game characters know what the Internet is, whereas Sonic does; and I am confused as to how. Now, one might respond that the information was added to Sonic's code (or something), but the original Sonic the Hedgehog game was released in 1991, and the Internet, at least as we know it today (as the place for social media and other things), didn't exist back then.