Question: has whis mastered ultra instinct?
Answer: Well, Whis. Whis mastered Ultra Instinct while Goku still has not mastered Ultra Instinct. ... Goku's Ultra Instinct has a time limit like in the fight against Jiren which costed him the fight and the fight in Kefla when he ran out of stamina. Whis has the Ultra Instinct naturally and uses it to train Goku and Vegeta.