Way before Vegeta began his training to reach his ultimate upgrade, Ultra Ego, Dragon Ball Super teased that particularly powerful achievement.
Dragon Ball Super Explains How Ultra Ego Works
Do people actually want this…? : r/SHFiguarts
Dragon Ball Super Set The Stage to Make GT Canon, & No One Noticed
Dragon Ball Super Teases Vegeta's History with Granolah
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Dragon Ball Super Set The Stage to Make GT Canon, & No One Noticed
Will Goku get Ultra Blue like Vegeta did? - Quora
How do you think Goku and Vegeta will find out about Gohan and Piccolo's new forms? : r/Dragonballsuper
Goku Teases His Real Feelings Towards Vegeta's Ultra Ego
Vegeta New Form in Super? Did SDBH Reveal Vegeta's New Transformation