DoctorRofatnik created Sonic Eclipse Online, a game where Roblox users could race as Sonic and friends, and it proved unsurprisingly popular with the young audience.

DoctorRofatnik, known to fans as “Doc,” looked almost mayoral in a tall white hat, a red tie and an American flag pin. A smirk was permanently plastered on his face as he roamed his domain on Roblox, ...