"Russian Submarine" is a Creepy. It lives in a hole. I also can't seem to figure out how to insert an image. Someone find a funny placeholder. Maybe the Super Stubborn Cliff, or just a picture of a Russian submarine. I tried putting the NSMBU Angry Sun but as said I couldn't figure it out.
Etymology
"Russian Submarine" is a codename. It is related to the Creepy's actual name, which has very little relation to the Creepy itself.
Biography
"Russian Submarine" is a Creepy. We do not know what is up with the Creepies.
Design
"Russian Submarine" looks not much like a submarine. It has elements of red in it, though.
Gameplay
"Russian Submarine" is an enemy. That means you are intended to eventually fight it.
Trivia
"Russian Submarine" is the first Patron-made Creepy. "Russian Submarine" was made by Holgar. "Russian Submarine" is based on the ARG The Sun Vanished.