Hydro Cannon, yep, it's the Therian Forme though, so if it's for Black/White I'm not sure if it would work (although I think you can only get DW Landorus from Therian Forme anyway.)
Im fine with the japanese one. Could you add 1x RH emolga? So the japanese requaza from bound. Emolga and mew ex? Then i guess we have a deal
P.s. which promo cards are you talking about??