Mewthree Share definition Flag The much wanted evolution of the most badass pokemon ever Mewtwo. Goes around killing trainers and other pokemon. You: "Hey is that mewtwo? Fiend: "No this is it when it takes steroids. Mewthree will destroy him. Mewthree by reddeath42 April 30, 2011 0 0 Get merch Get the Mewthree mug. Buy Now — $32.95 See more merch