where and is it a place or a person cuz thats were you find Jigglypuffs

go to Hearthome city and go all the way to the bottom of it then take a left youll see 2 doors to go through go to the one on the bottom and keep going down on that route its called route 212 towards the bottom you'll see an opening where a kid is just moving back and forth go into that place and go all the way into the back of it and you found the trophy garden. to find Mr.Blacklot take a right in the house you go into and he will be the first door.

hope it helped

you find the manager all the way down the right hallup the last door