It's not like we're alone here, stranded in the middle of nowhere, though SpongeBob is really stranded in that episode.That became the basis for "Rock Bottom," and that's how a lot of episodes ...

Coin #10 The final coin is in the Rock Bottom Museum, and SpongeBob fans should simply drop from the checkpoint, turn around, and walk behind the wall that is covered with paintings to claim it.

Gold Doubloon #4: Rock Bottom Museum – Clear out the creepy jellies in the museum, then look behind the paintings directly below the entrance. There’s a hidden doubloon here.

There are nine Doubloons in Halloween Rock Bottom, the fourth level of SpongeBob SquarePants: The Cosmic Shake. Three of them can be obtained on the first playthrough.