>>20660438>because it still has ScrappyOnly if it doesn't mega. In which case, only maxed 95 Atk and no Parental Bond does jack shit to Shield Form Aegislash with both Power Up Punch AND Sucker Punch.
And it sure as hell can't shrug off Sacred Sword; at max Atk it almost one-shots, and thanks to King's Shield and Kangaskhan relying on Sucker Punch, it's very easy to get a second one off. King's Shield resets it to 150 Defense before Kangaskhan can hit it, and, if it DOES try to attack, drops its attack twice as fast as Power Up Punch can raise it.
Megaskhan can take Aegislash out with Sucker Punch, but if it's in Shield Form it'll take two turns to kill and you're going to get nailed by Sacred Sword in the process, which even with mega stats will still do at least 50%. But if you mis-predict and try to Sucker Punch when Aegislash uses Swords Dance... well, goodbye.
So if you were talking about non-mega, then yes, Aegislash absolutely does counter Kangaskhan. And even against Megaskhan, a smart Aegislash can maim it before dying.