No, the move will only be able to be relearned by that specific event. If this weren't the case, non-shiny Enteis could use Extreme Speed, but they cannot.
Say you received the event Rayquaza with V-create and replaced it with Snore for some reason. You can go to the move re-learner and he should be able to reteach that move to the Pokemon. But if you caught the Rayquaza that you find in the story of the ORAS game, then it would not be able to re-learn V-create because it never learned it in the first place.
I hope this helps you. :)