Wooloo first captured the internet's heart in June 2019 following its reveal in a Pokémon Sword and Shield Nintendo Direct. Its perfectly spherical, fluffy design and tendency to roll away from danger immediately spawned a wave of fan art and memes. Known for its 'too pure for this world' aesthetic, Wooloo is primarily used in wholesome memes to represent something that needs to be protected at all costs or to describe someone feeling overwhelmed but staying soft. The 'Wooloo Roll' became a specific sub-genre of the meme, celebrating the creature's simple and adorable movement mechanics.