This is an adult Lillie transformed into a Nihilego-inspired monster girl, along with her mother Lusamine who has been transformed into a Pheromosa-inspired monster girl. All characters are depicted as 18+, no exceptions.

It was a bit of challenge for me to draw two characters at once, but in the end I’m really happy with the way it turned out, and I hope you like it too!

This version of the drawings has been edited slightly to make it SFW. If you want to view the NSFW version, it is currently available here on my FA page.

Here’s a quick little story I wrote to help explain these women’s incredible transformations. Enjoy!

Several years have passed since the events of Sun and Moon.

Unbeknownst to everyone, Lusamine, the former President of the Aether Foundation, has begun to obsess over Ultra Breasts once again. Never being able to forget the incredible power she wielded the time she was fused with the Ultra Beast Nihilego, Lusamine seeks to recreate that experience. Using the knowledge she gained during her time studying Pokémon fusion in Kanto with Bill, Lusamine created a device that will be able to once again fuse her with one of her precious Ultra Beasts.

The device was made up of three pods, and used a technology similar to that used for trading Pokémon across long distances. Two subjects would be placed into two of the pods. Once the main switch was flipped, a computer program would target the appropriate organic matter in both pods, at which point it would all be mixed together at the molecular level. Then, the matter is transported over to the third pod where the resulting gestalt would emerge.

It took a while, but after several failed attempts, Lusamine was eventually able to perfect the device in order to provide her with the most optimal fusion. While her previous fusion to Nihilego in the depths of Ultra Space was remarkable, it was also very unpredictable and quite impractical for daily life. That’s why, this time, Lusamine programmed her machine to only provide her the most important aspects of the targeted Ultra Beast.

For her fusion, Lusamine chose the Ultra Beast codenamed UB-02 Beauty, or as it’s more well known: Pheromosa. Lusamine hoped combining Pheromosa’s beauty with her own would make her the most gorgeous woman in all the world. Plus, it would be a nice bonus to be able to process Pheromosa’s incredible speed and agility as well.

At last, the day came for Lusamine to attempt her fusion. Placing a Beast Ball containing a captured Pheromosa inside one pod, Lusamine stepped inside her own pod and flipped the switch. In an instant, she and the Pheromosa where atomized and mixed together. Then, after only a moment, Lusamine reappeared inside the third pod. Stepping carefully out, Lusamine strode over to a mirror she had prepared in order to examine the results of her fusion. What she saw was beyond even her wildest expectations.

Looking at herself up and down, she saw that had managed to keep most of her human form, but beginning at her hips, the rest of her legs had both been remolded until they were largely indistinguishable from the legs of a Pheromosa. That wasn’t all however, as attached to the top of her head sat a distinct, large crown-like structure which was connected to two massive antennae. Most shocking of all however, was the fact that the process had seemingly reversed her in age by at least ten years! As she pondered her changes, Lusamine couldn’t help but feel the large, bug legs where a bit off-putting and her new claw-like feet made it difficult to stand, but in the end it was all worth it for the boost the fusion had given to her already incredible natural beauty.

Overcome with her new changes, suddenly, all Lusamine wanted to do was share her new technological achievement with everyone she could. Lusamine reset the machine and grabbed the nearest Beast Ball she could find and placed it in the first pod. Then, grabbing her Rotom Phone, she thought of who to call. Eventually, she settled on her daughter, Lille.

Lillie, she though, such a beautiful woman she’s become after all these years. But just like me, she can always be improved.

As quick as she could, Lusamine made some minor adjustments to the laboratory and set up what she hoped would be a suitable way to convince Lillie to enter a pod without her becoming suspicious. Then, while attempting to hide her excitement, Lusamine called her daughter and requested she come down to the laboratory in order to assist her. After a few moments, Lillie arrived. Lusamine, not wanting to show of her new form quite yet, hid out of sight in an adjacent room.

“Mother!” Lillie called out. “I’m here like you asked. Where are you?”

“Oh Lillie, thank you for coming so quickly” Lusamine said while out of sight on the other side an open door. “I’m sorry, but I’m very busy with an experiment that I’m running in this room and I can’t step away from it, but it seems that I’ve misplaced my research notes. Can you look for them for me?”

Glancing around the room briefly, Lillie immediately spied a stack of papers sitting inside one of the open pods.

Could those be the notes Mother was talking about? Lillie wondered to herself.

Without a second thought Lillie stepped inside the pod and bent down to pick up the papers. Before Lillie even had a chance to stand back up, Lusamine, using her new-found Pheromosa-enhanced speed, rushed back into the laboratory and slammed the door shut to Lillie’s pod and flipped the switch.

In an instant, Lillie was dematerialized and transported together with the Ultra Beast to the third pod where they were combined. A moment later, the pod doors opened, the new and improved Lillie emerged.

It turns out the Ultra Beast that Lusamine had placed into the pod prior to Lillie’s arrival had been UB-01 Symbiont, Nihilego. Like Lusamine, Lillie had kept most of her human features, but her legs had been entirely replaced by eight large tentacles similar in shape to those of a Nihilego.

The immediate aftermath of Lillie’s transformation involved much confusion at first, but once she had realized what had happened to her, Lillie became furious and demanded her mother change her back immediately.

Unfortunately for Lillie, even if Lusamine knew how to reverse the process (which she didn’t) the two back-to-back fusions had overstressed the machine and caused it to quite literally fall to pieces. There was nothing she could do. Whether she liked it or not, Lillie was now stuck as a PokéMonster girl.

With no other choice, Lillie decided to do what she could to adapt to her new body. It wasn’t easy at first, but eventually she got used to moving around on her tenacles.

Now, after several months, Lillie’s life has largely continued on the way it had been before her transformation. She was worried how her friends would react to seeing her new body but to her surprise, they were all very understanding and supportive.

Despite word spreading fast across Alola about her and her mother’s new condition, even today Lillie still finds that she gets stared at by people whenever she leaves the Aether Paradise to travel to one of the main islands. But, over time, she’s even gotten used to that as well.

What she hasn’t gotten used to, is her mother’s new lifestyle. Fully embracing her newfound youth, these days it seems Lusamine is less focused on science and research, and instead likes to spend her time on the beach hitting on younger men while rocking her signature black bikini. Much to Lillie’s dismay, her mother frequently drags her along to those beach outings.

And that's where she is today. Her mother had decided to take a trip to a beach on Melemele Island, and Lillie had been forced to come along. While Lusamine chatted up the locals, Lillie sat by herself and considered her situation.

Maybe being a PokéMonster girl isn’t such a bad thing after all. Lillie thought to herself as she sat on the beach, soaking up the bright Alolan sun. Mother and I have practically become the most famous people in Alola. I suppose I should just consider myself lucky Mother didn’t accidentally fuse me with a Buzzwole or a Guzzlord. I shouldn't be ashamed of my body, maybe I just need to embrace it like Mother does.

*beep beep*

Suddenly, Lillie’s thoughts were interrupted by the chiming of her phone. Pulling it out, Lillie saw she had a new text from Selene.

Hey Lillie! I can see a large crowd gathered down on the beach and I wondered if you and your mom where the cause of it. If you are nearby and you're looking to escape, I've just finished moving into my new place, and I'd love to hang out.

Finally possessing an excuse to leave the beach, Lillie headed up towards Hau'oli City and Selene’s new apartment, happily looking forward to spending some time with her friend.