Dragon Ball's humans are often the series' unsung heroes and they've persevered through some especially strenuous battles!

It’s the same case for his fight with Jiren too. Not only does he face ... so it made sense for Goku to just stick to his various levels of Ultra Instinct here. But it would have been cool.

In a wild twist, Goku confirms in the series finale that he had always had the power to transform into this state, thanks to training in the background following the fight against Majin Buu.