My friend has this shitty little ninjask he uses to up speed behind a substitute and then baton passes and reks my team. I bred a 5IV noibat with spc atk and the other is in atk. They both have infiltrator and are of jolly nature. Will this fix my problems?

I'm a complete beginner to competitive pokemon. He isn't. He doesn't know about my new noibats and probably doesn't know about infiltrator.