Pokémon: Mega Mawile-EX Premium Collection Box - Rules of Play says:

Beware the devious Mawile, a sweet-looking Pokémon with powerful steel jaws—and Mega Mawile-EX has even more chomping power! With cool Mega Mawile goodies, including three featured cards, a pin, and a coin, you’ll be ready to sink your teeth into the competition. Get the Mega Mawile- EX Premium Collection, and add the Deceiver Pokémon to your next game!