The Pokemon Sun and Moon demo has secrets, some of which are only viewable if you play multiple days in a row. Some players are convinced that a creepy NPC must be a part of those special events, even though he repeatedly admits there's nothing to him. Meet the mysterious old man. That's not a fan-given name; that's literally what the Sun and Moon demo calls him:
The mysterious old man appears through normal gameplay, at the end of the Mahalo Trail. The player encounters the old man behind a pillar, which is pretty sketchy. Coupled with his dork-like appearance, everything about the mysterious old man is kind of weird, which is why people have become obsessed with him:
"I stayed up all night just thinking about how creepy he was," said YouTuber GoodguyGastly in the theory video embedded above. Like many other players, GoodguyGastly went back to the original old man location many times and tried to see if he could do something to trigger new dialogue.
Honestly, the mysterious old man seems like a joke: He literally tells you to not look for him, because he has nothing for you. Players are nonetheless convinced there's something more to him, and many on social media are reporting returning to the mysterious old man spot multiple times, hoping to find something new. After all, isn't the demo supposed to have new content on multiple days?
— 犯人はZolvolt?! ;) (@Zolmation) October 21, 2016
So far, nobody has found the truth about the mysterious old man. With dialogue like "Can't resist the siren song of my shiny head?" I'm guessing that the old man is just there to troll players -- and it's working.
Well-played, Game Freak. Well-played.
Just because the old man isn't a thing doesn't mean the demo has no actual Easter eggs. Players like Neko Michi have discovered that one of the "secret events" hidden in the demo are kinda spooky. (Spoilers!) Behold, the return of "ghost girl".
Note the framing at the very end. Machamp walks by, and suddenly, the girl has vanished into thin air! Did Sun basically talk this girl into going into the afterlife? That might explain why she was scared to begin with.
This isn't the first time Pokemon games have flirted with ghosts. Infamously, both Pokemon X & Y as well as Pokemon Omega Ruby & Alpha Sapphire had their own creepy apparitions. I wouldn't be surprised if the full Sun and Moon games also have another ghost girl, with the one in the demo merely being a taste of things to come.
Finally, the biggest mystery in the demo: Are humans dating Pokemon now?? (Clip via Neko Michi.)