ok,...
Let Styles say that you don't have a familiar face here and he'll battle you. When he losses, he'll ask where did you came from. And when you're outside the battle, let him say with a suprise expression that you are chosen by Professor Oak and he'll add that you'll be his rival bcuz he's been chosen by Prof. Oak too. And he'll leave...
For Wind~, let him say that you must have been chosen by Oak and he'll battle you. After the battle, he'll say "Now I know why Prof. Oak has chosen you". When you're outside the battle, let him say that there are 7 chosen trainers, including you, by Prof. Oak to save Southmin, and let him say that don't get too cocky just bcuz you beat him. And he'll leave...