Rainbow Mushrooms are a rare type of mushroom found on Poptarpia. They are extremely rare and only about 5 have been recorded to exist. All have been eaten. The Rainbow Mushroom is most well-known for giving Nyan Cat and the Rainbow Meows their powers. Rainbow Mushrooms supercharge your stomach and let you make infinite rainbow farts. On Wafflius, they have a slightly more common counterpart, Deathly Mushrooms.