Golden Greenies

List all of the places you have found Golden Greenies.

I found one in Gloomy Manor although the mission escapes me.

I just found one in Haunted Towers B-3. You can go either before or after the Three Sisters fight. To find him, go to the shrine right next to the walkway with the coffin, not the bottom right one. Blow out all the candles and the Golden Greeny should appear.
Found one in A-4 of Gloomy Manor. I guess that's the mission you were trying to think of?

I believe it's in the Lab or Garage, but either way, I was able to catch it once. They may be fast like Speedy Spirits of the original Luigi's Mansion, but I bet they release more gold than the Speedy Spirits in Luigi's Mansion.