I really don't use Dragon types that much but I do have a Jirachi that knows Draco Meteor and my Lucario knows Dragon Pulse. Which one will be more effective? The Jirachi is level 61.
Draco Meteor is good for one hit but it halves your Special Attack. Jirachi is bulky enough to switch in and out though so it could work. And Draco would not always be expected since it's an event move.
But Lucario has higher SpAtk and Dragon Pulse is more reliable so personally I would go with that.