1. The two men in costume do not look alike. (pic 1 & pic 3)
2. Nearly anyone could be hired to wear the costume in an effort to "debunk" the original picture. In fact, if I were desperately trying to "debunk" a picture of myself in a costume, I would immediately hire someone who looks as much like me as possible to pose wearing that costume. It appears that is what has been done. Note that the first picture was taken on or before Jan 2017. I'm betting (but don't know for sure) that pic 3 was very recent.
3. The guy next to 0vomit in the original picture is Artur Davis. Explain his presence. Notice the 2 of them together in pic 1 & pic 2.
4. Another factor, which I am too lazy to research at the moment, is that at the time pic 1 first popped up on the internet (at least in general circulation), there was also info about the artist who created the costume. She made a big deal about saying that it was someone famous who bought it or was going to wear it. Never heard of Madie. Is he famous? I doubt it.
5. Another factor, again no time to dig on it, is that when pic 1 first surfaced, image searches provided no matches, indicating it was likely lifted directly from someone's phone.
Note that points 4 & 5 may be called into question, but they are not the crux of my argument. They are merely additional supporting evidence that could be dug into further.
Must be a slow week for the Internet conspiracy theorist debunkers because this "debunking" was pretty easy to debunk.