Liam knew the tricks to accelerate the hatching of a Pokémon egg, such as the proximity of a Pokémon with the Flame Body ability. But for now, the brown and purple colored egg would not be able to receive such aide. Liam was also trying to finalize his plan of attack for the gym. He sent Pidgeot to Oak's lab to take a break. He called in another Pokémon that would in theory do well at the gym.