"I don´t think so, Sigma!" Zero fired plasma shots, but Sigma avoided them easily.

"You fool! You had the chance to rule the world with me!" Sigma fired his Plasma Shock and hit Zero. The crimson reploid felt thousand of volts run through his body. He got seriously damaged and felt unconcious to the ground.

"You... You." X was furious against Sigma, he wiped some tears from his eyes and charged his X-buster.

"X, don´t be such fool like Zero. Join me, or you will end like him!" Sigma threatened X. "Accept or die!"

"Wait... X..." Zero said as he tried to to get on his feet. "He´s much more powerful than before, even with our new upgrades, he´s more than a match for us. Hurry X, run away! Run away!" Zero shouted X.

"Zero..." X said as he prepared to fire, "I´ll never run away, never!"

"Zero, shut up!" Sigma prepared his Plasma Explosion. "You denied my proposal of ilimited power two times, but this will be the last time! Die Zero!" Sigma fired at Zero and made full contact.

"X... good-bye...AARRGGHHHH" Zero cried in pain, and then, remained motionless.

"Zero! Zero!" X cried in despair as he realized that his partner was dead. "You, You!... You killed him Sigma! And you´ll pay for that!" X engaged his X-Saber adn attacked Sigma, but Sigma also engaged his Saber and blocked X´s attack. Sigma also attacked X, but avoided it easily. After a while, Sigma deactivated his Sigma-Saber and fired at X with his Plasma Explosion, making a loud noise when X fell on the metal floor.

"Zero...Zero..." X thought as he tried to regain power to stand up. His energy began to gain balance. Suddenly, X felt how a new energy filled his body.

"Ha, ha, ha. X, you are such a fool. You should have joined me." Sigma said to X´s motionless body, thinking that he was dead.

Meanwhile...

"Dr. Cain! Dr. Cain!" Dr. Trerson entered abruptly the the lab. "I think we´ve got some trouble!"

"What? What´s wrong?" Dr. Cain asked worried. "Is it something about X and Zero?"

"Uh... I fear so..." Dr. Trerson answered with pitty. "It looks like they´ve got real trouble. Spade contacted me when he saw beams of light come out of Sigma´s fortress."

"Damn it! I´m not finished with the Assault Pets yet!" Dr. Cain replied. "The only thing we can do is to continue the pets."

"Yeah!" Dr. Trerson exclaimed excitely. "Let´s get to work!"

Now, back at Sigma´s fortress, X had stood up! "No! This can´t be!" Sigma shouted when he saw X standing up. "How could you take my Plasma Explosion??!! No one ever could!"

"If you hadn´t killed Zero, my anger wouldn´t helped activate the Hyper Power asleep in my body! That helped recover my energy, and now you will die!" X shouted to the astonished Maverick. Suddenly, X power crystal in his forehead began shinning! And then, five beams of light came out of it and raised to the sky. The beams of light transformed themselves into Armor-Parts, which came and joined X´s body; but the last beam joined X´s Saber, and it turned on blue fire! "This will be the last battle Sigma!"

Sigma prepared his Plasma Explosion once again and fired it at X. But when the attack striked him, he didn´t feel it a bit! "That´s the best you can do?"

Suddenly, Sigma´s new Hunter Dog appeared and joined Sigma, making him even more powerful! Sigma and X continued fighting with their different weapons, but Sigma had the advantage.

"He´s quite powerful, I must defeat him now!" Just then, X remembered what Dr. Cain said. "Your new Saber can interact with Zero´s one."

"That´s it!" X ran to Zero´s motionless body and took his Saber. He felt a strange power between the two Sabers. "What the heck??!!" Suddenly, both Sabers combined together, the Saber´s fire turned from blue to red. "Wow! This is cool!" X exclaimed to himself. Then, he jumped toward Sigma and slashed Sigma´s Saber in half!

"How, how could you do this?!" Sigma said astonished by X´s power. "Now, you´ve made me use this! Prepare to die X!"