They went out of their way to show Kangaskhan not Mega Evolved in the Crabrawler reveal.
>>27947851
i'm kind of worried theyre going to change type effectiveness and water will become weak to ice and swampert will have 2 4x weaknesses
>>27948841
Freeze-Dry probably confirms this.
>>27948895
*debunks
if ice needs an exclusive move to be super effective against water it most likely isnt going to happen