Kounetsu: Another 'where to find Mystery Goos' thread?

Ansem: Be nice, Kounetsu. Okay Kami, here's what you do: go to the pumpkin patch in Halloween Town. Keep exting and reentering until Black Fungi are walking around. Attack one of the large jack-o-lanterns and lift it up. Lock on to the nearest Black Fungus and throw. The Black Fungus will die instantly and drop 1000 munny and a Mystery Goo every time. Repeat as needed.