The onus is on you to provide proof. All Goku does is train the only stretch is where you attempt to conclude he magically got it even though he only did that in super as a last resort.Uh where's the proof? Back your shyt up. The last transformation we saw him get was Super Saiyan God and he didn't get it from the training. Everytime he returns from being dead in the other world he has a new technique which requires him to borrow someone else's power.