McM is the shelf label for the lower aisle of the castle library (non-fiction). If you have the Library Slip, you can press this shelf to open the dungeon passageway.
Use the gold coin from the fountain to pay your admission into the mordred Museum, and get the Library slip from the stack of books. In the castle library (first floor right), go to the lower aisle and press the shelf marked Mc-M (for Mordred).
it is McM
under the library, you click on the McM label and stairs appear
if you mean in astro knights, the mcm is in the library in the castle
McM
in the castle library click mcm in the non-fiction section to get into the dungeon
Go to the library and then there will be a sign that says McM. Click on it and you're in!
McM is the shelf label for the lower aisle of the castle library. If you have the Library Slip, you can press this shelf to open the dungeon passageway.
The library SLIP is marked "Non-fiction McM", which is the lower aisle in the library. Press the spot on the shelf marked McM.
The McM is on the bottom floor in the library. You can click on the mcm if you have the library card. The library card is in Mordred's house museum.
You do not get or use a bucket on Astro Knights Island.
you click on the paper under mcm
There is no treasure chest on Astro Knights Island.