The November issue of CoroCoro Ichiban will include a special Marshadow promo! Thanks goes to Vincent S. and Bangiras for the translations!
[P] Spirit Echo: Choose 1 Basic Pokemon card from each player’s discard pile and play it onto that player’s bench.
[C][C] Surprise Attack: 40 damage. Flip a coin. If tails, this attack does nothing.
Weakness: Darkness (x2)
Resistance: Fighting (-20)