When Shiranui entered Mt. Ember, he felt a similar heat to what he felt back at the Cinnabar Gym. He trudged forward until he got to the deepest part of the cave where he saw Moltres. "Saisei, I choose you!" He called Mewtwo out and the fiery bird took a battle stance and let out a loud squawk. "Saisei, Psychic! Mega Ring activate!" Shiranui activated his Mega Ring and an orb of energy surrounded Saisei. The orb shattered to reveal the Mewtwo smaller than he was with his purple tail now attached to the back of his head. His fingers and toes were purple and instead of a secondary neck he had what looked like a wreath with sharp horns at each end. He was now a Mega Mewtwo Y and he let loose with a psychic force much more powerful than back at the gym. Moltres was smashed against the wall and Shiranui readied a Dusk Ball. "Dusk Ball, go!" He threw the Dusk Ball and Moltres was drawn in.
"So this is Mega Evolution," the Mewtwo stated.
"I believe this is one of your Mega forms," answered Shiranui as he was watching the shaking Dusk Ball, "I can show you the other later on."
"I look forward to it," replied Mewtwo as the ball pinged shut, "Looks like you have another Pokémon to train."
"I'll name it Suzaku," said Shiranui, "Let's get out of here before we get too dehydrated." Saisei nodded and Shiranui recalled the Mewtwo before making a hasty exit.
"So this is Mega Evolution," the Mewtwo stated.
"I believe this is one of your Mega forms," answered Shiranui as he was watching the shaking Dusk Ball, "I can show you the other later on."
"I look forward to it," replied Mewtwo as the ball pinged shut, "Looks like you have another Pokémon to train."
"I'll name it Suzaku," said Shiranui, "Let's get out of here before we get too dehydrated." Saisei nodded and Shiranui recalled the Mewtwo before making a hasty exit.