Pokemon - Mastering Mewtwo Part 4 - Mastered by Mewtwo ending
WARNING - rule 63 & sex; transformation

Pokemon and related characters belong to Nintendo & Game Freak.
Story by 2BIT.


This story has reached its conclusion. There are 2 different endings. This is the "Mastered by Mewtwo" ending, while the other is the "Mewtwo Mastered" ending. It probably should be self-explanatory, but this one features Mewtwo turning the tables, with a rule 63 transformation involved. The alternate ending, posted separately, is the more obvious ending. There's still rule 63, but also bestiality. I wonder which ending you'll prefer?


Having exited the Rocket base near the power plant, Red was eager to hear what Mewtwo thought about joining him now that he had bonded with his Lucario. Mewtwo had thought hard about the possibility. Red had proven himself capable enough to defeat Mewtwo in battle more than once. He was a powerful trainer. But was he worthy of Mewtwo's power? The feline Pokemon looked at Red seriously as he gave his answer. "If you wish to be my master, you must first master me..." he stated. Red looked a tad confused. "I've already beaten you in battle..." he said. Mewtwo nodded. "That is one part. Now, you must prove that you can control my power..." he stated. Red nodded. "Okay... How would I do that?" he asked. Mewtwo smiled. "Pin me... Without your Pokemon." he challenged. Red looked a tad shocked by the idea. "You can just fly out of my reach!" he pointed out. "I'll give you a ten minute head start before I fly away. Pin me down, if you would master me." Mewtwo insisted. Red wasn't sure if this was even possible without Pokemon, but if Mewtwo was testing him, he felt it would be foolish to refuse. "All right, Mewtwo... I'm a champion, I can take whatever you dish out... So watch out! Here I come!" he said with determination!

Red ran towards Mewtwo, but the Psychic Pokemon wasn't playing around. He swiftly moved around the trainer and tossed him aside with Psychic! "You'll have to do better than that!" he taunted. Red got up with a defiant glare, and tried again to outrun Mewtwo's Psychic, to no avail. "You disappoint me... I know you can do better..." Mewtwo smirked. Red nodded, and took a shot. "Quick Ball, go!" he shouted, tossing the blue Poke Ball at Mewtwo and watching the Pokemon vanish inside it. He then threw himself on top of the ball. He knew Mewtwo would probably break out, but once he did, he'd be pinned. The ball shook under him for a bit, then broke open, sliding out from under Red while Mewtwo emerged, staring up at the trainer atop him. "Got ya!" Red said smugly. However, Mewtwo quickly rolled them over so he was on top! "No, I've got you... Can you regain your advantage?" he grinned. Red tried to roll them back, but only succeeded in boring Mewtwo. The Pokemon stood up. "You are not strong enough to control me... There are no humans who are." he said, getting ready to leave. Not wanting to leave in failure, Red made one last ditch effort, grabbing something from his bag and reaching it towards his Mega Ring. However, Mewtwo turned and with a flick of his wrist, pulled the Mega Ring and the Genderite away from the trainer and over to him! "Thought I'd change my mind if I were female, eh? I wonder... What effect could this stone have on YOU!!" he roared, taking the stone and ring in his paws and touching them together, thinking about what he wanted to happen next, and causing a brilliant light to surround Red! The trainer screamed in surprise as he felt his body change shape, his clothes ripping as he increased in size! His shoes slipped off his feet as they changed into feline paws, his gloves bursting as his five fingers morphed into three large paw tips. A tail burst out of his pants before they fell in a heap around him, and a strange second neck grew between his upper body and his new feline-shaped head. What's more, he felt growths on his chest, while his crotch had lost an old friend in favor of a new slit. He, or she, stood with open vest and hat still fitting between her cat ears as she realized what she'd become. "I... I'm a Mewtwo!! A... girl Mewtwo!!" she gasped, covering her mouth as she heard a feminine voice escape!

Mewtwo admired his handiwork, smiling a little. "Interesting... That was beyond my expectations..." he said, moving slowly toward the panicked Red. "W-wait... Stop right there! I'm a trainer, not your mate!" she protested. Mewtwo stopped suddenly. "...Mate?" he muttered. Looking at Red's glorious female Mewtwo body, he quickly realized what he was getting at. Mewtwo had only meant to humiliate Red the way he'd been humiliated. Now, however, a chance to have something he previously believed unattainable was presented to him. A chance to mate with a female Mewtwo! He felt he'd already proven himself the true master between the two of them. Now he would mate her and seal his dominance over the strongest trainer in the region. "...You're a Mewtwo now. I'm the only mate there is for you!" he said, pulling Red to him with Psychic. Red tried to pull away at first, but once her body was close to his, she blushed, getting a good look at the Pokemon's powerful body. "Ah... N-nooo... This body...!" Red grunted, realizing her Mewtwo form actually WANTED to mate with him!

Mewtwo lifted them both with his psychic powers, and slowly caressed Red's female body with his paws, brushing her fine white fur and moving up to her lovely Mewtwo bust. Red gasped and gritted her teeth, not sure she wanted to let on that she wanted this. However, her tail freely entangled his without being controlled. She couldn't hide it. "Once I claim you as my mate, I will be the master, and you and your Pokemon will obey me from here on..." Mewtwo said, grinning as he thrusted his hips forward, joining them in a swift penetration! Red yelped at this new sensation, but she couldn't move her arms to resist or to grab onto him. "Aaaah!! N-no... I-I was meant...to be the master..." she whimpered. Mewtwo groped her breasts and started moving his hips back and forth as they levitated in midair, moaning softly as her walls covered his Pokemon meat. Red blushed and groaned as she held back moans of pleasure, her mind racing as he took her. The psychic Pokemon's hands rose and manipulated the psychic energy as his hips kept thrusting. Red felt her ass groped and her tits tweaked at once, and her tongue hung out a little as her efforts to resist started to break down. Mewtwo sped up his thrusts as he saw this, murring as his knot started popping in and out of her entrance, seeking to tie them together. Red finally moaned a little, and gave up the facade of resistance. "Ooooohhh!! W-why does it feel so... so good!? Aaaah, M-mewtwooooo!!" she cried. "Ha... Maybe I should mate with you until an egg is produced? The world needs more Mewtwos!" the male mused, groaning loudly as his knot was pulled into the female's pussy, tying them together! Mewtwo freed Red's arms at this point, and she quickly wrapped them around him, panting and gasping. "J-just take me, Mewtwo! You ultimate Pokemon!!" she cried. He held her sides and kept thrusting as best he could, moaning loudly as his climax neared. "You're mine, trainer...!!" he panted. Red screeched as she felt another new sensation. Her walls clamped Mewtwo's phallus as her juices coated it, her body awash in pleasure through the climax! This pushed Mewtwo over the edge, and he roared triumphantly as his cum flooded into Red's depths! As he lowered them to the ground, Red blushed and gazed up at him. "I guess you win... master..." she purred.

After cuddling together for a short time, Mewtwo teleported free from her pussy, not content with mating with the new fellow Mewtwo just once at the moment. As Red lay face up on the ground, she suddenly felt her hips lifted and a hard something prod her tail hole! Mewtwo smirked as Red winced from this sensation, then cried out in pain from the penetration that followed! "I must take you fully, if I'm to be your master, right?" Mewtwo purred, slowly thrusting into Red's tight tail hole, watching as her expression went from pained to pleasured, her breasts jiggling as his thrusts continued. She flailed her limbs a bit as she moaned, unsure what to do with herself. The tightness of her rear was pushing Mewtwo close to the edge again fast, but he didn't want to get there yet, so he teleported again after a bit. "Ohhh... Wh-what now...?" Red gasped, looking around before Mewtwo suddenly reappeared atop her, reaching for her furry bust and slowly sliding his hard, slick cock between her breasts. With a grin, he squeezed her boobs in his paws and started moving his dick through her cleavage, stopping briefly as the head poked out, pointing at her face. "Have a taste..." he purred. Red gulped and obeyed, licking the tip ever so gently, getting the salty taste of pre on her tongue. "Mmmm...more, master..." she sighed, prompting Mewtwo to start titfucking her properly, their moans mingling as he poked through again and again, her tongue teasing him each time. Mewtwo groaned happily, and gladly released a small load of cum to coat the fellow Mewtwo's face a little. "Ahhh... Wonderful... Now, I'm ready to finish claiming you..." he whispered, to which Red blushed. "O-okay..." she said, licking some of the spunk from her face with a shy smile. Mewtwo quickly warped back down between her legs, and using Psychic to pin her to the floor, he thrusted deep into her pussy once again, his hips rocking against hers even more fiercely than before! Red gasped and moaned, urging her new master on, giving in to the pleasure more and more! Mewtwo knotted her quickly, and came a third time soon after, sealing Red's fate as his mate! He kissed her, resting calmly atop the female Mewtwo.

Later, Mewtwo found one of Red's empty Poke Balls, and tossed it at the former trainer. To Red's surprise, her body was enveloped in a red light, and soon pulled into the ball, cementing the Pokemon's ownership of her and her entire team! A Mewtwo had indeed been mastered, but THE Mewtwo remained the true master. "You'll be safe in this ball... And don't worry, together we'll save the Mewtwo species from extinction... my mate..." he said to the ball, smiling.

The End