Yep the Elite force can be played by anyone so I will reserve Mewtwo for ya Draco..
And Broby, I'm basing this Darkrai on the one from Pokémon mystery dungeon: Explorers of Time, Darkness and Sky where Darkrai wanted to plunge the world into an eternal nightmare.
And these are a couple of Mega Darkrai I have found for his mega form. Personally I like the first one the most
[img]http://static2.wikia.nocookie.net/__cb20121127203421/ssb4/images/thumb/1/19/Darkrai_Transformed.png/1000px-Darkrai_Transformed.png[/img]
[img]http://th05.deviantart.net/fs71/PRE/i/2013/244/6/6/mega_darkrai_by_iqbalputra-d6kkh81.jpg[/img]
[img]http://www.mypokecard.com/en/Gallery/my/galery/67bKhMC5SzQT.jpg[/img]
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My CS
Name: Michael (Mike) Fertar
Age: 21
Gender: Male
Pokémon species: Riolu
Moves: force palm, dragon pulse, earthquake, strength
Crush: Keilan
Side: Good
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Name: Ant Fertar
Age: 19
Gender: Male
Pokémon species: Absol
Moves: Night slash, Aerial Ace
Crush: N/A
Side: neutral