Same thing with Gus's Powerblast and Rikimaru's Surprise. It deletes the effect of the gate, so ability card boosts are not doubled.
The Shadow cards don't negate the effect of the Opponent's Gate though. It only makes them not get the Gate Bonus. So Gus's Powerblast and Rikimaru's Surprise isn't exactly like the Shadow Cards.
what about mascarades throw it makes your opponet have to lose an ability card that fixes the stratigy just save this stratgy for the end of the battle