Chuck roared in anger and then collapsed as Marshadow went back into his shadow, the darkness dissipating from him. Cosmo, on the other hand, had turned into a Cosmoem and was unresponsive.
Chuck got to his feet, his sclera black instead of white, accentuating his blue eyes. He activated his Z-Ring and Marshadow unleashed it's signature Z-Move, Soul-Stealing 7-Star Strike, smashing through everyone in his way.
Lusamine turned to them and said "You're too late! This Cosmog will open up a path into Ultra Space, so I can go and stop the Blinding One! It can only access this power when under intense stress."
It's her typical Pokémon, the Slowpoke, the Pikachu, and whatever ones from the game. Also, surprised you got there that quickly, in the games you have to run through Faba, Team Skull, and the Aether Foundation grunts.
From the images in Chuck's mind, they could see Cosmo being tortured as well as Marshadow appearing out of Chuck's own shadow. It lunged at Lusamine, only to be stopped by her Clefable, who caught it's fist.