Leave spawn going towards the beach, there will be a second tunnel to the left leading into a smaller square area with 3 tunnels one straight ahead, one to the left and one in the right top corner of the square. That top right corner one is the one you take, after that you will be in a forresty area with a house walk towards the house where it begins to open up and take a right you'll see a tunnel that leads under ground go through that tunnel and then at the base of the tunnel take a right and the cereal monster will be there he's a big driodeka from star wars.
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Succ The Zucc's post in Piano is broken was marked as the answer