He travels between Earthrealm, Guiltyrealm and Narutoria as realm crossing is a real part of Mortal Kombat. Alternatively all three worlds exist on the same timeline as Guilty Gear takes place a little over 100 years from the Mortal Kombat time likely based on our present. Naruto world can easily exist in the past or future. Many episodes from the original series after Sasuke went away start grabbing at old legends from the past in dire need of story material. If in the future, Guilty Gear technology is outlawed and magic plays an increasingly large role so the Naruto universe may well be the logical next step in civilization. Japan was destroyed in Guilty gear and Chipp was obsessed with becoming President. Perhaps upon achieving his ambition his goal was to turn the world into the next J