It is shiny, level 100, has perfect IVs, and the OT is Sakati.Tv. Also, I got it from a wonder trade. I'm pretty sure it's hacked, but I just wanna make sure.
It is most likely hacked for several reasons:
Who would trade a shiny Pokémon on Wonder Trade? They would get something like a Weedle in return for their time.
The level is 100. Sun and Moon are some of the hardest games to get to Lvl. 100, meaning that the trader must have either grinded way too much or just hacked it in.
6 IV breeding is still not common with a great setup, so them getting a shiny and perfect IVs is extremely rare for no payoff.
So the Rhydon is most likely hacked in.
The OT means its from some kind of giveaway on youtube , its genned in but still a cool shiny!