you'd have to like, dig into your save data! it's not displayed anywhere in game. maybe i should have added a little tally marker somewhere for fun, ha ha~
the game actually DOES stop counting when you get over 50-100 or so!! but wow, i can't even imagine. i think i've been playing 20-30 hours and i don't even have ten of them yet!
there are some crazy people on the Monster Mind discord who have made password utilities and stuff like that! maybe one of them could tell you...