I normally would never do this, Trust me, I hate boosters as much as the last guy, but this challenge is literally impossible. I maybe see 1 dragonfire per 20 games and it just gets destroyed by my teammates. Same with the other killstreaks. So if anybody is willing to help, I could help them as well.
Pokemon Black FC: 0089-1636-4703 Pokemon SS FC:2752-0116-6235