And/or, it's just a pretty generic statement that was used to describe most, if not all, of the power-ups and transformations that Gokuu and his friends underwent throughout the series, such as the Super God Water, Saichorou's dormant power-unleashing, Kaiouken, all the Super Saiyan stages (including Grade II and III), Bobbodi's awakening, etc.DBZGTKOSDH wrote:Obviously, the statement for Super Saiyan 3 got retconed, at least for the anime.
Heck, Gohan gets his hidden power drawn out twice, and I don't doubt that, if the plot needed it and/or Toriyama wanted to continue the story after the Boo arc, he would've had it done to him a fourth time. And that's not even counting Gohan's Super Saiyan 2 transformation at the Cell Games, touted by Gokuu and the story itself to be his "big awakening" that was meant to finish Cell off and cement Gohan's place as Gokuu's successor. Then, in the following arc, both Gokuu and Vegeta attained Gohan's "special unique form", and Gohan was quickly pushed into the shadows while Gokuu reached a new plateau of power in the form of yet another Super Saiyan form, and eventually defeated the main villain, returning to his "rightful" spot as the main character (to be honest, Gohan was pretty much back to being "number two" when Gokuu mentioned returning to the 25th TB).