it was a raining star fall from Lugia. She was trying to get her revenge on humans for their abuse to Pokémon. She then saw you and notice you were actually taking care of your pokemon because your Pokémon were shielding you from the star fall. Your best Pokémon, a Charizard, was trying its hardest to keep you in its arms and shield you

Lugia: confused dragon noises

Charizard: roars, creating a firewall around your Pokémon and you