Once the battle began, Zhang Cheng quickly opened the Detection System to check the stats of Duan Hong's Staraptor:
Name: Staraptor (Level 43) Gender: Female Potential: B Type: Normal, Flying Held item: Sharp Beak (Boosts the power of Flying-type moves used by the Pokémon holding it) Basic moves: Tackle, Growl, Quick Attack, Wing Attack, Double Team, Endeavor, Whirlwind, Aerial Ace, Take Down, Agility Learned moves: Protect, Hyper Beam Egg moves: Mirror Move, Steel Wing, Roost Ability: Reckless (Boosts the power of moves that cause recoil when used by a Pokémon with this ability.) Notes: Staraptor, the Predator Pokémon. Fierce by nature, she will boldly challenge opponents even larger than herself.
Duan Hong's Staraptor had the hidden ability Reckless, which made a formidable combination with the high-damage Flying-type move Brave Bird.
However, Zhang Cheng discovered through the Detection System that this Staraptor had yet to learn Brave Bird, making her somewhat less threatening.
One thing worth noting was that Duan Hong's Staraptor had inherited Mirror Move. That made it difficult for Zhang Cheng to have Pidgeot use Brave Bird, because the moment Pidgeot used it, Duan Hong would surely order Staraptor to copy it with Mirror Move.
If both Pokémon used Brave Bird at the same time, Staraptor would definitely have the advantage. Reckless would boost the power of her Brave Bird.
Another concern was that this Staraptor knew Endeavor. Zhang Cheng knew firsthand how useful that move could be, so once Staraptor reached critical HP, he would have to keep Protect in reserve to stop her from using Endeavor to equalize their HP.
"Staraptor, use Take Down!"
Seeing that Zhang Cheng had not attacked immediately, Duan Hong seized the initiative and ordered Staraptor to use Take Down.
Take Down could also trigger Reckless. Since Staraptor could not use