Hey, for that matter even I have tried to breed some quint IV Kangaskhans, so I clearly understand how good the Mega form is. However I'm trying to devise a strategy against that. There's the Scizor defense, and the fighting offense with pokemon like Lucario. Ghost pokemon like Trevenant are good alternatives in some instances where the player foolishly doesn't have a Scrappy ability Kangaskhan, but they are few and far between. I can't remember if Blaziken (fire/fight pokemon) is legal in this year's VGC's, but it could be useful with the high attack and SpA stats and the Speed Boost ability. However being weak to a lot of stuff doesn't really help, since mediocre defense and SpD mean it wouldn't take much to damage or faint your one Mega for a match. What options have you found which help you combat this problem?