What he means is that Mew just wasn't planned to be put into the first set of games, not that Mew itself wasn't created until the very end. Since they put in Mewtwo, they had already though of the idea Mew, and Mewtwo's origins and all of that, but they didn't actually want to put Mew into the game itself, and instead save it for sometime later. The decision to actually put Mew into Red and Green after all was a last-second thing among just a few people who worked on the games, when they noticed they had space for one more Pokemon, and so they did.im still lost
how could mewtwo exist in the games if mew wasn't intended to exist at all originnally?
:S