Lately I've been seeing many variations of parodies of this Pokémon in the Pokémon image gallery. Kurenai has mentioned that it's become popular on Tumblr mainly because of it's big eyed deep stare expression. In case you don't know what Espurr looks like, here's what it looks like:
Shadowmancreator even wants a whole image gallery for Espurr. That would require an entry for it, but does it even warrant one?