he traded all his shinies for delta mons from firefiber, and then traded some of those deltas for regular mons. Usually a good natured delta shiny would be worth 2-3 good natured regular shinies or another delta shiny, although is also usually worth a little less if the natures aren’t beneficial (like how the ones blade got from firefiber are all neutral natured or detrimental). I traded the d volc, bisharp, and tyrantrum to him for d. blaziken and d. magmortar in return.
Also, that total is nothing compared to what some people have. I have multiple boxes full of shinies for example that I got through trading, dexnaving and friend safari w/ the shiny charm odds, etc.