Legendary Shadow

After Dewgong came out, Liam decided to go with Ditto since he had not used it for a while, and Ditto was also the same level as Dewgong. When Ditto came out, Pryce was quite surprised by its unique coloration. He had never seen such an exclusive looking Pokémon, and he decided that he was going to steal this guy's Pokémon before he leaves town.

Ditto transformed into Dewgong, but instead of the shiny white color Dewgongs usually have, this Dewgong's color was a rainbow. Pryce was now intrigued, but he didn't want to ask because he knew Liam would not tell him. And so, Pryce started the battle off by having his Dewgong use Ice Beam right away. 

Ditto also used an Ice Beam, and they crashed into each other, but strangely Ditto's beam was much more durable than Dewgong. Pryce used that opportunity to tell his Dewgong to use headbutt. 

Using the cover of the ice, Dewgong slipped by and head-butted Ditto right in the stomach, causing him to fly up in the air as Dewgong prepared another attack. This time Dewgong used Aurora Beam to blast Ditto, who was still in the air and shocked by the surprise attack. 

Ditto used that opportunity to turn into a Squirtle and used his shell to defend against Dewgong's attack. Pryce was beyond shocked at this point as he thought, "This Ditto could transform into any Pokémon." Soon, ideas started to formulate in his mind, and he was now certain that he must have this Ditto. 

Liam smirked because he saw the look in Pryce's eyes and thought, "This guy would try to attack me and steal my Pokémon." Even though this was not the first time anybody had decided to do that to him, Liam was curious as to how he would do that. With his monstrous lineup, Pryce would be hitting a brick wall. 

Distracted by his thoughts, Liam couldn't send out a command in time as Dewgong sent Ice Beam freezing Ditto. Ditto transformed into a Charizard smashing out of the ice as he blew a Flamethrower towards Dewgong, who dodged it. It then used surf as a huge wave came out of nowhere, crashing down towards Charizard/Ditto. Ditto quickly transformed once again. 

This time Ditto transformed into Alakazam and used psychic to freeze the water in place. Pryce was getting a little excited as this Ditto was giving him quite a show. Dewgong then froze the wave and adequately smashed it into pieces as he sent it towards Ditto, who had transformed into Alakazam. Ditto transformed once again, but this time into Articuno and used Ice Beam to freeze the incoming attack. 

It was then that Pryce agreed with his thoughts and his actions became noticeable. If this Ditto can transform into Legendary Pokémon and if Pryce had it in his possession, he could conquer the world and use that Ditto to capture real legendary Pokémon. And to top it all off, the Pokémon that Ditto was transforming into, all had the rainbow color that Ditto possessed.