>>12319241And yours too, probably, since unless you're going to soft reset a bunch it'll be essentially random whether you or your rival are faster. Chespin with Tail and Vine Whip is the only amount of strategy that might work.
Winning the first battle isn't even 100% certain now. As far as I remember I've never lost it, but people do. Unless as
>>12319259 says you can train first, a lot of people will be starting their XY career with a loss.