NeonZ
Member
Please never write anything ever.
I mean, really, do you raise the same complaint about Goku being able to sense ki and use kiais in the 23rd Budokai even though the manga never showed his training at all?
Incorporating a technique from a GoD after training under the master of the GoD in most cases would be a fairly natural development, it's only odd here because the anime itself, the first version of the story everyone saw in this case, didn't do it.