There are more pros to Luxray though than there are to Metagross. Luxray can drop down after a turn of waiting but can be quickly picked up so that it can re-use its power, whereas Metagross can use its power once per turn but you dont always flip heads. Also, if Luxray were dragged up to teh active via warp point, inviting trap, luring flame ect it can always level up and retreat, attach one energy and retreat, poketurn out or even Champions Room out for free. Metagross has a huge problem because of its massive retreat cost it needs to be warp pointed or warp energy-ed out. I think teh biggest con that Luxray has though is that it can be sniped by teh most popular cards in teh format from teh bench (ex. Garchomp and Palkia SPs) because having 80 HP is dangerous in teh format. Metagross can survive 1 hit from those but its hard to shake that damage anyway. Not sure how much of a pro you consider that. And I would like to add that you would have to run at LEAST 3 cards to run Metagross, Candy or Metang, vs only running 2 to play Luxray GL LvX.