This Facebook account: "Sonic Mania - Games" is sharing stolen art from other people (including my art) without credits. He is also sharing links from t-shirt shops (Audionshirt, Teechip, SunFrogShirts) with stolen art. I'm trying to solve the problem. If you want to help me, just don't share the post/ don't buy the t-shirt with my stolen art.
He's a real imposter and a thief.
Update: Aaron Webber (the official Sonic Community Manager) and the Twitter community are helping me defeat these thieves! https://twitter.com/DiGi_Valentine/status/901763790785699841