after Majin Buu was brought back to life in the Dragon Ball Super World, he has become much more powerful then ever before. this of course would make Goku give it his all against a much more powerful Majin Buu, at one point Majin Buu attempted to flee by jumping into a different dimension but Goku followed him, however though by traveling into this new world made both Goku and Majin Buu loose there ki powers and abilities and ki control but still kept there strength, durability, and even speed.