Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
That battle is entirely fabricated and never happened! Basically it's just a proof of concept (data -> video), and it's obvious that with a little bit of work PO can spit out valid replays for cart viewing (and youtube uploading)
Hey can you send me the Blaziken of Shiny Mew2's, he said that you would have it for me, and just to tell you he said that I could have it lol. the messages about it are on both of our walls or whatever.