So I want to actually get good at Pokemon. I'm really interested in NU tier and my friend who usually battles competitively agreed to make an NU team and battle me. He's wrecked me every time we've battled, save for one time where I destroyed his entire team with a lucky barrage of Megahorns.

His current team is Dragonair, Exeggutor, Rotom (Flying/Electric form), Camerupt, Braviary, and Mankey (If I remember correctly.

If I somehow manage to get rid of his Exeggutor, his Dragonair always gets me.

Can you guys help me create a team to beat his?