At the end of Bio-Broly, when Broly returns to Hell, Goku is called to defeat Broly, who is rampaging there. In the following movie, Fusion Reborn, Goku says that only Majin Buu has made him use his Super Saiyan 3 form. This would infer that Goku defeated Broly using Super Saiyan 2. I have repeatedly tried to add this to Broly's "Power" section on his wiki page but it keeps getting deleted. Why? I have a feeling that there are plenty of Broly fanboys that don't want his power to be nerfed. You cannot argue against what is shown in the actual movies for Broly, that's just common sense.