Liam called on Grimm. 
"Grimm! Start off with Shadow ball!" Liam called. The tiny ghost formed the ball of black energy and threw it at Mew, who took it directly. Mew then used Dark Pulse. Grimm took a direct hit. 
 "Disable!" Liam ordered. Mew's Dark Pulse was blocked from being used. Mew used Dazzling Gleam.
Grimm was ordered to use Shadow Sneak next. Mew turned and used Me First and made a stronger Shadow Sneak that hit for super effective damage. Grimm then did his Shadow Sneak. 
"Astonish!" Liam called.
Mew attempted to use Nasty Plot, but flinched.
Both Pokemon used Shadow Ball. When the dust cleared, both Pokemon were looking tired. Grimm started to glow white.
 "Grimm is evolving." Liam said with a smile. However, the evolution stopped and he was still a Duskull. 
"Dus dus kull." Grim said. 
"You want to fight Mew as a Duskull?" Liam asked. Grimm nodded.
"Now Shadow Sneak!" Liam called. Mew used Metronome, which turned into Hyper Beam, which phased right though Grimm. Mew used Psychic and took the Master Ball from Liam and pulled it over. Mew tapped the button to go in. The ball fell to the cave ground with a soft thunk and snapped shut. Liam walked over and picked up the Master Ball. "Welcome to the team Mew." Liam said. He praised Grimm for the good job. He then turned to Shiranui: "Onto the Indigo Plateau, do you want to just wrap there with Sherlock or just wrap to Viridian City?