I currently have 144 of 187 (the 43 are Hint Medals). I think my rarest one is either the "Scored 100" from doing Funfests and getting more than 100+ points (I did a few years back with like 6 of us, it was so fun!), the "Pokérus Discoverer" medal, or the "Achiever Lv. 2" medal, for doing more than 100 Funfest Missions. I love doing those.
![Razz :P](./images/smilies/icon_razz.gif)
How many do you have? What's your rarest one or the one you're most proud of?
Edit 3/19/19: I just got the Exp. Millionaire Medal for getting 1,000,000 Exp. in one day today! It wasn't that bad actually. I used the White Treehollow for a lot of it (using the Breeders with Chansey/Blissey/Happiny) and some wild Audino for a bunch. I trained some of my lower leveled Pokémon that never got raised because they were just used for battling with friends!