Since I did SM, I will do XY:
* Ash-Greninja being some special snowflake thing that happens once every 1000 years and that was in a prophecy was indeed.
* Greninja didn't need to hug the spotlight
* There should have been Contests, not Showcases, which are watered-down contests.
* Serena doing...
Snorlax won't be good against Dark Void. Melmetal would be a good choice against Latios because he's a Mythical and can resist both Dragon and Psychic.