Hey ho
Someone from the guild just got his Victini and taught it Celebrate via the NPC in Vulcan Fair Registration Center. Another one did it aswell, but a 3rd one and me, we can't to that. At first we thought it's maybe a bug with the form, so I changed it to normal one, but still can't teach it Celebrate.
As you can see, it's not because I don't have enough money to do that and it hasn't the move right now.
Would be nice if this is fixable within the last few days of the event.