Jigglypuff is one of the most famous Pokémon, alongside Pikachu, Bulbasaur, Charmander, and Mewtwo, mostly because it has appeared many times in the still-running "Pokémon" anime. It usually appears unexpectedly and puts Pokémon and humans near it to sleep for a few minutes by singing its trademark song. It has a black permanent marker, similar to a Sharpie, with which it often draws on people and Pokémon's faces while they are asleep. This is an act of revenge because everyone falls asleep when they hear Jigglypuff's song and Jigglypuff assumes it's because they are very bored by it. Since people are upset when Jigglypuff puts them to sleep, and Jigglypuff is upset when they fall asleep, it is a vicious circle.