From the Super Mario Wiki
Coo! (Yamamura's Key Course) (known as Coo! (Key Door Course Edited) in the British English version) is Yamamura's sixth official course in Super Mario Maker, released on March 16, 2016, and is a heavily revised version of Mary O.'s Key Course. As such, it is set in the ghost house theme and in the Super Mario Bros. game style.
The layout is nearly the same as the original, except that the winged Stretch and the Note Blocks are replaced with a Goomba and Brick Blocks, respectively, the area with the Pink Coins is slightly altered for easier movement, and an additional Big Dry Bones is placed near the end.
Enemies[edit]
Names in other languages[edit]
| Language
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Name
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Meaning
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| Japanese |
ポッポ～（ヤマムラ流 カギを使ったコース宿題）
Poppo~ (Yamamura Ryū Kagi wo Tsukatta Kōsu Shukudai) |
Coo Coo~ (Yamamura Style: "A Course That Used Keys" Homework)
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