This comic was done up by spencerdragon spencerdragon and all credit goes to him!
As many of you know, Pokemon Origins didn't end well for Mewtwo. It wasn't horrible (as in he wasn't killed), but the Charizard fanbase got a huge circlejerk and it was at Mewtwo's expense.
This is a much better ending than what the minds at Nintendo and GameFreak came up with! A psychic can look into the future enough to prepare for almost anything...and eventually Mewtwo had to set his trump card into play.
I hope you enjoyed the gurgly Charizard there, Spencer!