Remember when Gamefreak revealed Crabrawler at the Pokémon World Championships and showed it KOing Mega Kanghaskhan, Landorus-T and Talonflame to hype it up as some new super competitive attacker?
...How the tables have turned.
I'm pretty sure that was just edited footage.
Also, the Kangaskhan wasn't Mega, it was just a regular Kangaskhan.