Gohan turning into Super Saiyan 2 was always something of Goku's plan, but it didn't turn out exactly like how he wanted. This transformation was one that represented a major change for Gohan ...
Dragon Ball Super manga introduced Beast Gohan in Chaṕter 99 ("Son Gohan's Ultimate Awakening!"), while adapting the Super ...
Similarly, Gohan turning Super Saiyan 2 is the culmination of three Sagas of character development and framed through one of the few actually permanent deaths in the franchise (Android 16).