Pokemon GO Halloween 2018 is nearly upon us, and today we're taking a peek at what's about to roll out. This year's event will come after the current madness that is Meltan. That's the Mythical (or is it Legendary?) Pokemon that's been appearing in Pokemon GO over the past week or so, always turning into Ditto whenever it was caught. This is easily one of the strangest tricks Niantic's played thus far on the Pokemon GO public, that's for certain.