Encyclopedia Entry:
A plant type monster with a body covered in something like white balls of fluff. Its body is extremely light, and it moves by floating through the air. Its mature form has the shape of a human, but while developing, they are little more than tiny white balls of fluff. Because they look mysterious while dancing through the air, they are called “Kesaran Pasaran who invite happiness.” If you catch one, it is said to bring happiness.
Exactly opposite of what you might suppose their nickname, their fluff balls are actually powerful hallucinogenic compounds that are extremely dangerous to people. If you breath one in, your ability to think will become limited, and all you’ll want to do is “feel happy.” However, while they’re still developing, the hallucinogenic effect is weak, and so often times it just makes you feel “a little better.” That’s probably how they get the nickname.