Pinky is a sapient, genetically-enhanced laboratory mouse who seeks to take over the world along with his cagemate and associate, The Brain. Despite his genetic uplifting, Pinky isn't near as intelligent as the Brain, but is extremely loyal to him and considers him his closest friend. He is also extremely goofy, cheerful albeit emotionally sensitive, somewhat hyperactive and gullible. He is known for his random verbal exclamations such as "Narf!", "Zort" and "Poit!". Interestingly, Pinky doesn't seem to share any of the Brain's ambitions in ruling the world, and participates in the Brain's plots merely because he wants to help him.
Both Pinky and the Brain can be seen as graffiti when the film crew are making a movie Ready Player One.