I think he doesn't really count as a pokemon, because he is just a clone of Mew. I like him, but I think he is more of a villain then a Pokemon. Whats your opinion. Is he a pokemon or a clone
Yes, despite the fact Mewtwo was cloned from the DNA of Mew, it's still a Pokemon. Because of the fact it was cloned and used for experiments, it doesn't trust humans one bit which can be seen in the first movie "Mewtwo Strikes Back", the sixteenth movie "Genesect and the Legend Awakened", and one of the side stories "Mewtwo-Prologue to Awakening"
