I have gotten a Melloetta from an event @Rio de Janeiro
I would give it away since you can't use It for anything anyways. Not even at the battle subway.
Plus I think that using legendaries is for fa9907s. Real poke trainers use lame pkmn to beat the wannabes'!
(truth has to be said)
It's sad that I have no internet connection to use my Nintendo ds with... I am still trying to understand where the so called dream world is, for I'm a newb.
And before calling me newb, respect. I played Gen 1, 2 and now 5!